OPtimal TIming of antenatal COrticosteroid administration in pregnancies complicated by early-onset fetal growth REstriction (OPTICORE): study protocol of a multicentre, retrospective cohort study

Mette Van De Meent, Dianne G. Kleuskens, Wessel Ganzevoort, Sanne J. Gordijn, Elisabeth M.W. Kooi, Wes Onland, Bas B. Van Rijn, Johannes J. Duvekot, René F. Kornelisse, Salwan Al-Nasiry, Reint K. Jellema, H. Marieke Knol, Gwendolyn T.R. Manten, Susanne M. Mulder-De Tollenaer, Jan B. Derks, Floris Groenendaal, Mireille N. Bekker, Ewoud Schuit, A. Titia Lely, Judith Kooiman^*