Jan Koornstra

Search results

• 2021

  Associations of Height With the Risks of Colorectal and Endometrial Cancer in Persons With Lynch Syndrome

  Brouwer, J. G. M., Newcomb, P. A., Bisseling, T. M., Figueiredo, J. C., Hopper, J. L., Jenkins, M. A., Koornstra, J. J., Lindor, N. M., Vasen, H. F. A., Win, A. K., Kampman, E. & van Duijnhoven, F. J. B., Feb-2021, In: American Journal of Epidemiology. 190, 2, p. 230-238 9 p.

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• Dye-Based Chromoendoscopy in Patients With Lynch Syndrome: An Individual Patient Data Meta-Analysis of Randomized Trials

  Houwen, B. B. S. L., Mostafavi, N., Vleugels, J. L. A., Huneburg, R., Lamberti, C., Rivero-Sanchez, L., Pellise, M., Stoffel, E. M., Syngal, S., Haanstra, J. F., Koornstra, J. J., Dekker, E. & Hazewinkel, Y., Apr-2021, In: AMERICAN JOURNAL OF GASTROENTEROLOGY. 116, 4, p. 825-828 4 p.

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  3 Citations (Scopus)

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• Is a colorectal neoplasm diagnosis a trigger to change dietary and other lifestyle habits for persons with Lynch syndrome? A prospective cohort study

  Brouwer, J. G. M., Snellen, M., Bisseling, T. M., Koornstra, J. J., Vasen, H. F. A., Kampman, E. & van Duijnhoven, F. J. B., Apr-2021, In: Familial Cancer. 20, p. 125-135 11 p.

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  1 Citation (Scopus)

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• 2020

  Associations of Pathogenic Variants in MLH1, MSH2, and MSH6 With Risk of Colorectal Adenomas and Tumors and With Somatic Mutations in Patients With Lynch Syndrome

  German HNPCC Consortium, Dutch Lynch Syndrome Collaborative, Finnish Lynch Syndrome Registry, Engel, C., Ahadova, A., Seppala, T. T., Aretz, S., Bigirwamungu-Bargeman, M., Blaeker, H., Bucksch, K., Buettner, R., Cappel, W. T. D. V. T. N., Endris, V., Holinski-Feder, E., Holzapfel, S., Hueneburg, R., Jacobs, M. A. J. M., Koornstra, J. J., Langers, A. M., Lepisto, A. & 23 others, Morak, M., Moeslein, G., Peltomaeki, P., Pylvaenaeinen, K., Rahner, N., Renkonen-Sinisalo, L., Schulmann, K., Steinke-Lange, V., Stenzinger, A., Strassburg, C. P., van de Meeberg, P. C., van Kouwen, M., van Leerdam, M., Vangala, D. B., Vecht, J., Verhulst, M-L., Doeberitz, M. V. K., Weitz, J., Zachariae, S., Loeffler, M., Mecklin, J-P., Kloor, M. & Vasen, H. F., Apr-2020, In: Gastroenterology. 158, 5, p. 1326-1333 8 p.

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  29 Citations (Scopus)

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• Diet quality and colorectal tumor risk in persons with Lynch syndrome

  Eijkelboom, A. H., Brouwer, J. G. M., Vasen, H. F. A., Bisseling, T. M., Koornstra, J. J., Kampman, E. & van Duijnhoven, F. J. B., Dec-2020, In: Cancer epidemiology. 69, p. 1-7 7 p., 101809.

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  2 Citations (Scopus)

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• Limited diagnostic accuracy and clinical impact of single-operator peroral cholangioscopy for indeterminate biliary strictures

  de Vries, A. B., van der Heide, F., Ter Steege, R. W. F., Koornstra, J. J., Buddingh, K. T., Gouw, A. S. H. & Weersma, R. K., Feb-2020, In: Endoscopy. 52, 2, p. 107-114 8 p.

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  22 Citations (Scopus)

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• Personalised surveillance for serrated polyposis syndrome: results from a prospective 5-year international cohort study

  Bleijenberg, A. G. C., IJspeert, J. E. G., van Herwaarden, Y. J., Carballal, S., Pellise, M., Jung, G., Bisseling, T. M., Nagetaal, I. D., van Leerdam, M. E., van Lelyveld, N., Bessa, X., Rodriguez-Moranta, F., Bastiaansen, B., de Klaver, W., Rivero, L., Spaander, M. C. W., Koornstra, J. J., Bujanda, L., Balaguer, F. & Dekker, E., Jan-2020, In: Gut. 69, 1, p. 112-121 10 p.

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  28 Citations (Scopus)

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• Substantial and sustained improvement of serrated polyp detection after a simple educational intervention: results from a prospective controlled trial

  Bleijenberg, A. G. C., van Leerdam, M. E., Bargeman, M., Koornstra, J. J., van Herwaarden, Y. J., Spaander, M. C. W., Sanduleanu, S., Bastiaansen, B. A. J., Schoon, E. J., van Lelyveld, N., Dekker, E. & IJspeert, J. E. G., 1-Dec-2020, In: Gut. 69, 12, p. 2150-2158 9 p.

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  7 Citations (Scopus)

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• The (ir)relevance of the abandoned criterion II for the diagnosis of serrated polyposis syndrome: a retrospective cohort study

  Bleijenberg, A. G. C., IJspeert, J. E. G., Rodriguez-Alcalde, D., Carballal, S., Visser, M. R., Pellise, M., Koornstra, J. J., Rana, S. A., Latchford, A., Balaguer, F. & Dekker, E., 1-Apr-2020, In: Familial Cancer. 19, 2, p. 153-160 8 p.

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• The optimal imaging window for dysplastic colorectal polyp detection using c-Met targeted fluorescence molecular endoscopy

  de Jongh, S. J., Vrouwe, J. P. M., Voskuil, F. J., Schmidt, I., Westerhof, J., Koornstra, J. J., de Kam, M. L., Karrenbeld, A., Hardwick, J. C. H., Robinson, D. J., Burggraaf, J., Kamerling, I. M. C. & Nagengast, W. B., 1-Oct-2020, In: Journal of Nuclear Medicine. 61, 10, p. 1435-1441 7 p.

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  8 Citations (Scopus)

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• 2019

  Effect of chromoendoscopy in the proximal colon on colorectal neoplasia detection in Lynch syndrome: a multicenter randomized controlled trial

  Haanstra, J. F., Dekker, E., Cats, A., Nagengast, F. M., Hardwick, J. C., Vanhoutvin, S. A., Cappel, W. H. D. V. T. N., Vasen, H. F., Kleibeuker, J. H. & Koornstra, J. J., Oct-2019, In: Gastrointestinal endoscopy. 90, 4, p. 624-632 9 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  15 Citations (Scopus)

• Low Incidence of Advanced Neoplasia in Serrated Polyposis Syndrome After (Sub)total Colectomy: Results of a 5-Year International Prospective Cohort Study

  Bleijenberg, A. G. C., IJspeert, J. E. G., Carballal, S., Pellise, M., Jung, G., van Herwaarden, Y. J., Bisseling, T. M., Nagtegaal, I. D., van Leerdam, M. E., Spaander, M. C. W., van Lelyveld, N., Bessa, X., Rodriguez-Alcalde, D., Bastiaansen, B. A. J., de Klaver, W., Bemelman, W. A., Bujanda, L., Koornstra, J. J., Rivero, L., Rodriguez-Moranta, F. & 2 others, Balaguer, F. & Dekker, E., Sep-2019, In: AMERICAN JOURNAL OF GASTROENTEROLOGY. 114, 9, p. 1512-1519 8 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  1 Citation (Scopus)
• 2018

  Endoscopic versus percutaneous biliary drainage in patients with resectable perihilar cholangiocarcinoma: a multicentre, randomised controlled trial

  Coelen, R. J. S., Roos, E., Wiggers, J. K., Besselink, M. G., Buis, C. I., Busch, O. R. C., Dejong, C. H. C., van Delden, O. M., van Eijck, C. H. J., Fockens, P., Gouma, D. J., Koerkamp, B. G., de Haan, M. W., van Hooft, J. E., IJzermans, J. N. M., Kater, G. M., Koornstra, J. J., van Lienden, K. P., Moelker, A., Damink, S. W. M. O. & 8 others, Poley, J-W., Porte, R. J., de Ridder, R. J., Verheij, J., van Woerden, V., Rauws, E. A. J., Dijkgraaf, M. G. W. & van Gulik, T. M., Oct-2018, In: The lancet. Gastroenterology & hepatology. 3, 10, p. 681-690 10 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  72 Citations (Scopus)

• Extracolonic cancer risk in Dutch patients with APC (adenomatous polyposis coli)-associated polyposis

  Ghorbanoghli, Z., Bastiaansen, B. A. J., Langers, A. M. J., Nagengast, F. M., Poley, J-W., Hardwick, J. C. H., Koornstra, J. J., Sanduleanu, S., Cappel, W. H. D. V. T. N., Witteman, B. J. M., Morreau, H., Dekker, E. & Vasen, H. F. A., 1-Jan-2018, In: JOURNAL OF MEDICAL GENETICS. 55, 1, p. 11-14 4 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  15 Citations (Scopus)

• Features of incident colorectal cancer in Lynch syndrome

  Argillander, T. E., Koornstra, J. J., van Kouwen, M., Langers, A. M. J., Nagengast, F. M., Vecht, J., Cappel, W. H. D. V. T. N., Dekker, E., van Duijvendijk, P. & Vasen, H. F. A., Oct-2018, In: United European Gastroenterology Journal. 6, 8, p. 1215-1222 8 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  9 Citations (Scopus)

• No Difference in Colorectal Cancer Incidence or Stage at Detection by Colonoscopy Among 3 Countries With Different Lynch Syndrome Surveillance Policies

  German HNPCC Consortium, Dutch Lynch Syndrome, Finnish Lynch Syndrome Registry, Engel, C., Vasen, H. F., Seppala, T., Aretz, S., Bigirwamungu-Bargeman, M., de Boer, S. Y., Bucksch, K., Buttner, R., Holinski-Feder, E., Holzapfel, S., Hueneburg, R., Jacobs, M. A. J. M., Jarvinen, H., Kloor, M., Doeberitz, M. V. K., Koornstra, J. J., van Kouwen, M. & 20 others, Langers, A. M., van de Meeberg, P. C., Morak, M., Moeslein, G., Nagengast, F. M., Pylvanainen, K., Rahner, N., Renkonen-Sinisalo, L., Sanduleanu, S., Schackert, H. K., Schmiegel, W., Schulmann, K., Steinke-Lange, V., Strassburg, C. P., Vecht, J., Verhulst, M-L., Cappel, W. D. V. T. N., Zachariae, S., Mecklin, J-P. & Loeffler, M., Nov-2018, In: Gastroenterology. 155, 5, p. 1400-+ 12 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  63 Citations (Scopus)
• 2017

  Clinical risk factors of colorectal cancer in patients with serrated polyposis syndrome: A multicentre cohort analysis

  IJspeert, J. E. G., Rana, S. A. Q., Atkinson, N. S. S., van Herwaarden, Y. J., Bastiaansen, B. A. J., Van Leerdam, M. E., Sanduleanu, S., Bisseling, T. M., Spaander, M. C. W., Clark, S. K., Meijer, G. A., van Lelyveld, N., Koornstra, J. J., Nagtegaal, I. D., East, J. E., Latchford, A., Dekker, E. & Dutch Workgroup Serrated Polyps, 1-Feb-2017, In: Gut. 66, 2, p. 278-284 7 p.

  Research output: Contribution to journal › Article › Academic › peer-review

  Open Access
  69 Citations (Scopus)

• Incidence of small bowel neoplasia in Lynch syndrome assessed by video capsule endoscopy

  Haanstra, J. F., Al-Toma, A., Dekker, E., Vanhoutvin, S. A. L. W., Nagengast, F. M., Mathus-Vliegen, E. M., van Leerdam, M. E., de Vos Tot Nederveen Cappel, W. H., Veenendaal, R. A., Cats, A., Sanduleanu, S., Vasen, H. F. A., Kleibeuker, J. H. & Koornstra, J. J., Jul-2017, In: Endoscopy international open. 5, 7, p. E622-E626 5 p.

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• 2016

  Impact of non-anastomotic biliary strictures after liver transplantation on healthcare consumption, use of ionizing radiation and infectious events

  de Vries, A. B., Koornstra, J. J., Ten Foe, J. R. L., Porte, R. J., van den Berg, A. P., Blokzijl, H. & Verdonk, R. C., Jan-2016, In: Clinical Transplantation. 30, 1, p. 81-89 9 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  5 Citations (Scopus)
• 2015

  Adherence to surveillance guidelines after removal of colorectal adenomas: A large, community-based study

  van Heijningen, E-M. B., Lansdorp-Vogelaar, I., Steyerberg, E. W., Goede, S. L., Dekker, E., Lesterhuis, W., ter Borg, F., Vecht, J., Spoelstra, P., Engels, L., Bolwerk, C. J. M., Timmer, R., Kleibeuker, J. H., Koornstra, J. J., de Koning, H. J., Kuipers, E. J. & van Ballegooijen, M., Oct-2015, In: Gut. 64, 10, p. 1584-1592 9 p.

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  63 Citations (Scopus)

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• Molecular Fluorescence Endoscopy Targeting Vascular Endothelial Growth Factor A for Improved Colorectal Polyp Detection

  Tjalma, J. J., Garcia-Allende, P. B., Hartmans, E., Terwisscha Van Scheltinga, A. G., Boersma-van Ek, W., Glatz, J., Koch, M., van Herwaarden, Y. J., Bisseling, T. M., Nagtegaal, I. D., Timmer-Bosscha, H., Koornstra, J. J., Karrenbeld, A., Kleibeuker, J. H., van Dam, G. M., Ntziachristos, V. & Nagengast, W. B., 17-Dec-2015, In: Journal of Nuclear Medicine. 57, 3, p. 480-485 6 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  40 Citations (Scopus)

• Narrow-band imaging for the detection of polyps in patients with serrated polyposis syndrome: a multicenter, randomized, back-to-back trial

  Hazewinkel, Y., Tytgat, K. M. A. J., van Leerdam, M. E., Koornstra, J-J., Bastiaansen, B. A., van Eeden, S., Fockens, P. & Dekker, E., Mar-2015, In: Gastrointestinal endoscopy. 81, 3, p. 531-538 8 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  23 Citations (Scopus)

• Prevalence of small-bowel neoplasia in Lynch syndrome assessed by video capsule endoscopy

  Haanstra, J. F., Al-Toma, A., Dekker, E., Vanhoutvin, S. A. L. W., Nagengast, F. M., Mathus-Vliegen, E. M., van Leerdam, M. E., Cappel, W. H. D. V. T. N., Sanduleanu, S., Veenendaal, R. A., Cats, A., Vasen, H. F. A., Kleibeuker, J. H. & Koornstra, J. J., Oct-2015, In: Gut. 64, 10, p. 1578-1583 6 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  29 Citations (Scopus)

• Yield of Screening Colonoscopy in First-degree Relatives of Patients With Serrated Polyposis Syndrome

  Hazewinkel, Y., Koornstra, J-J., Boparai, K. S., van Os, T. A. M., Tytgat, K. M. A. J., Van Eeden, S., Fockens, P. & Dekker, E., 2015, In: Journal of clinical gastroenterology. 49, 5, p. 407-412 6 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  15 Citations (Scopus)
• 2014

  Completion rate of small bowel capsule endoscopy is higher after erythromycin compared to domperidone

  Westerhof, J., Weersma, R. K., Hoedemakers, R. & Koornstra, J. J., 19-Sep-2014, In: Bmc gastroenterology. 14, 5 p., 162.

  Research output: Contribution to journal › Article › Academic › peer-review

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  9 Citations (Scopus)

  228 Downloads (Pure)

• Non-small-bowel abnormalities identified during small bowel capsule endoscopy

  Hoedemakers, R., Westerhof, J., Weersma, R. K. & Koornstra, J. J., 14-Apr-2014, In: World Journal of Gastroenterology. 20, 14, p. 4025-4029 5 p.

  Research output: Contribution to journal › Article › Academic › peer-review

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  5 Citations (Scopus)

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• Predictors of colorectal neoplasia after polypectomy: based on initial and consecutive findings

  van Enckevort, C. C. G., de Graaf, A. P. J., Hollema, H., Sluiter, W. J., Kleibeuker, J. H. & Koornstra, J. J., Apr-2014, In: The Netherlands Journal of Medicine. 72, 3, p. 139-145 7 p.

  Research output: Contribution to journal › Article › Academic › peer-review

  11 Citations (Scopus)

• Regulation of TRAIL receptor expression by β-catenin in colorectal tumours

  Jalving, M., Heijink, D. M., Koornstra, J. J., Boersma-van Ek, W., Zwart, N., Wesseling, J., Sluiter, W. J., de Vries, E. G. E., Kleibeuker, J. H. & de Jong, S., May-2014, In: CARCINOGENESIS. 35, 5, p. 1092-1099 8 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  12 Citations (Scopus)
• 2013

  Endoscopic Corticosteroid Injections Do Not Reduce Dysphagia After Endoscopic Dilation Therapy in Patients With Benign Esophagogastric Anastomotic Strictures

  Hirdes, M. M. C., van Hooft, J. E., Koornstra, J. J., Timmer, R., Leenders, M., Weersma, R. K., Weusten, B. L. A. M., van Hillegersberg, R., Henegouwen, M. I. V. B., Plukker, J. T. M., Wiezer, R., Bergman, J. G. H. M., Vleggaar, F. P., Fockens, P. & Siersema, P. D., Jul-2013, In: Clinical Gastroenterology and Hepatology. 11, 7, p. 795-+ 8 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  57 Citations (Scopus)

• Extracolonic cancer risk in patients with serrated polyposis syndrome and their first-degree relatives

  Hazewinkel, Y., Nagengast, F. M., Vasen, H. F., van Os, T. A. M., van Leerdam, M. E., Koornstra, J-J., Dekker, E. & Reitsma, J., Dec-2013, In: Familial Cancer. 12, 4, p. 669-673 5 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  21 Citations (Scopus)

• Features of Adenoma and Colonoscopy Associated With Recurrent Colorectal Neoplasia Based on a Large Community-Based Study

  van Heijningen, E-M. B., Lansdorp-Vogelaar, I., Kuipers, E. J., Dekker, E., Lesterhuis, W., Ter Borg, F., Vecht, J., de Jonge, V., Spoelstra, P., Engels, L., Bolwerk, C. J. M., Timmer, R., Kleibeuker, J. H., Koornstra, J. J., van Ballegooijen, M. & Steyerberg, E. W., Jun-2013, In: Gastroenterology. 144, 7, p. 1410-1418 9 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  65 Citations (Scopus)

• Intestinal pseudo-obstruction as a complication of paragangliomas: Case report and literature review

  Osinga, T. E., Kerstens, M. N., van der Klauw, M. M., Koornstra, J. J., Wolffenbuttel, B. H. R., Links, T. P. & van der Horst-Schrivers, A. N. A., Dec-2013, In: The Netherlands Journal of Medicine. 71, 10, p. 512-517 6 p.

  Research output: Contribution to journal › Review article › Academic › peer-review
  10 Citations (Scopus)

• Quality colonoscopy and risk of interval cancer in Lynch syndrome

  Haanstra, J. F., Vasen, H. F. A., Sanduleanu, S., van der Wouden, E. J., Koornstra, J. J., Kleibeuker, J. H. & Cappel, W. H. D. V. T. N., Dec-2013, In: International Journal of Colorectal Disease. 28, 12, p. 1643-1649 7 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  23 Citations (Scopus)

• Role of new endoscopic techniques in Lynch syndrome

  Haanstra, J. F., Kleibeuker, J. H. & Koornstra, J. J., Jun-2013, In: Familial Cancer. 12, 2, p. 267-272 6 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  14 Citations (Scopus)

• Ursodeoxycholic acid counteracts celecoxib in reduction of duodenal polyps in patients with familial adenomatous polyposis: a multicentre, randomized controlled trial

  van Heumen, B. W. H., Roelofs, H. M. J., Vink-Borger, M. E., Dekker, E., Mathus-Vliegen, E. M. H., Dees, J., Koornstra, J. J., Langers, A. M. J., Nagtegaal, I. D., Kampman, E., Peters, W. H. M. & Nagengast, F. M., 6-Aug-2013, In: Orphanet journal of rare diseases. 8, 11 p., 118.

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  10 Citations (Scopus)

  187 Downloads (Pure)
• 2012

  Diagnostic yield of small bowel capsule endoscopy depends on the small bowel transit time

  Westerhof, J., Koornstra, J. J., Hoedemaker, R. A., Sluiter, W. J., Kleibeuker, J. H. & Weersma, R. K., 7-Apr-2012, In: World Journal of Gastroenterology. 18, 13, p. 1502-1507 6 p.

  Research output: Contribution to journal › Article › Academic › peer-review

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  37 Citations (Scopus)

  231 Downloads (Pure)

• Nurse endoscopists perform colonoscopies according to the international standard and with high patient satisfaction

  van Putten, P. G., ter Borg, F., Adang, R. P. R., Koornstra, J. J., Romberg-Camps, M. J. L., Timmer, R., Poen, A. C., Kuipers, E. J. & Van Leerdam, M. E., Dec-2012, In: Endoscopy. 44, 12, p. 1127-1132 6 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  31 Citations (Scopus)

• Small bowel endoscopy in familial adenomatous polyposis and Lynch syndrome

  Koornstra, J. J., Jun-2012, In: Best practice & research in clinical gastroenterology. 26, 3, p. 359-368 10 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  39 Citations (Scopus)
• 2011

  A bioinformatical and functional approach to identify novel strategies for chemoprevention of colorectal cancer

  Heijink, D. M., Fehrmann, R. S. N., de Vries, E. G. E., Koornstra, J. J., Oosterhuis, D., van der Zee, A. G. J., Kleibeuker, J. H. & de Jong, S., Apr-2011, In: ONCOGENE. 30, 17, p. 2026-2036 11 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  17 Citations (Scopus)

• Perspectives for tailored chemoprevention and treatment of colorectal cancer in Lynch syndrome

  Heijink, D. M., de Vries, E. G. E., Koornstra, J. J., Hospers, G. A. P., Hofstra, R. M. W., van Vugt, M. A. T. M., de Jong, S. & Kleibeuker, J. H., Nov-2011, In: Critical Reviews in Oncology/Hematology. 80, 2, p. 264-277 14 p.

  Research output: Contribution to journal › Review article › Academic › peer-review
  6 Citations (Scopus)

• TNF-related apoptosis-inducing ligand cooperates with NSAIDs via activated Wnt signalling in (pre)malignant colon cells

  Heijink, D. M., Jalving, M., Oosterhuis, D., Sloots, I. A., Koster, R., Hollema, H., Kleibeuker, J. H., Koornstra, J. J., de Vries, E. G. E. & de Jong, S., Feb-2011, In: JOURNAL OF PATHOLOGY. 223, 3, p. 378-389 12 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  10 Citations (Scopus)

• Total Abdominal F-18-FDG Uptake Reflects Intestinal Adenoma Burden in Apc Mutant Mice

  Heijink, D. M., Kleibeuker, J. H., Nagengast, W. B., Oosterhuis, D., Brouwers, A. H., Koornstra, J. J., de Jong, S. & de Vries, E. G. E., 1-Mar-2011, In: Journal of Nuclear Medicine. 52, 3, p. 431-436 6 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  8 Citations (Scopus)
• 2010

  Increased colorectal cancer risk during follow-up in patients with hyperplastic polyposis syndrome: a multicentre cohort study

  Boparai, K. S., Mathus-Vliegen, E. M. H., Koornstra, J. J., Nagengast, F. M., van Leerdam, M., van Noesel, C. J. M., Houben, M., Cats, A., van Hest, L. P., Fockens, P. & Dekker, E., Aug-2010, In: Gut. 59, 8, p. 1094-1100 7 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  190 Citations (Scopus)

• Increased colorectal cancer risk in first-degree relatives of patients with hyperplastic polyposis syndrome

  Boparai, K. S., Lemmens, V., van Os, T. A. M., Mathus-Vliegen, E. M. H., Koornstra, J. J., Nagengast, F. M., van Hest, L. P., Keller, J. J., Dekker, E. & Reitsma, J., Sep-2010, In: Gut. 59, 9, p. 1222-1225 4 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  106 Citations (Scopus)

• Listening to music does not reduce pain during sigmoidoscopy

  Meeuse, J. J., Koornstra, J. J. & Reyners, A. K. L., Aug-2010, In: European journal of gastroenterology & hepatology. 22, 8, p. 942-945 4 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  13 Citations (Scopus)

• Low-volume PEG plus ascorbic acid versus high-volume PEG as bowel preparation for colonoscopy

  Corporaal, S., Kleibeuker, J. H. & Koornstra, J. J., Nov-2010, In: SCANDINAVIAN JOURNAL OF GASTROENTEROLOGY. 45, 11, p. 1380-1386 7 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  96 Citations (Scopus)

• One to 2-Year Surveillance Intervals Reduce Risk of Colorectal Cancer in Families With Lynch Syndrome

  Vasen, H. F. A., Abdirahman, M., Brohet, R., Langers, A. M. J., Kleibeuker, J. H., van Kouwen, M., Koornstra, J. J., Boot, H., Cats, A., Dekker, E., Sanduleanu, S., Poley, J-W., Hardwick, J. C. H., Cappel, W. H. D. V. T. N., van der Meulen-de Jong, A. E., Tan, T. G., Jacobs, M. A. J. M., Mohamed, F. L. A., de Boer, S. Y., van de Meeberg, P. C. & 6 others, Verhulst, M-L., Salemans, J. M., Van Bentem, N., Westerveld, B. D., Vecht, J. & Nagengast, F. M., Jun-2010, In: Gastroenterology. 138, 7, p. 2300-2306 7 p.

  Research output: Contribution to journal › Article › Academic › peer-review
  182 Citations (Scopus)
• 2009

  Agile patency system

  Koornstra, J. J. & Weersma, R. K., Mar-2009, In: Gastrointestinal endoscopy. 69, 3, p. 602-603 2 p.

  Research output: Contribution to journal › Letter › Academic › peer-review
  9 Citations (Scopus)

• An unexpected cause of iron deficiency detected by capsule endoscopy

  Flierman, A., Koornstra, J. J. & Weersma, R. K., Jun-2009, In: Netherlands Journal of Medicine. 67, 6, p. 247-248 2 p.

  Research output: Contribution to journal › Editorial › Academic › peer-review

  2 Citations (Scopus)

• Beneath the Surface

  Martens, H. A., Koornstra, J. J., Diepstra, A., Sprenger, H. G. & Kallenberg, C. G. M., Feb-2009, In: American Journal of Medicine. 122, 2, p. 132-134 3 p.

  Research output: Contribution to journal › Article › Academic › peer-review