Visual outcome including visual field defects after treatment of paediatric optic pathway glioma: A nationwide cohort study

C. A.M. Bennebroek^*, J. van Zwol, M. C. Montauban van Swijndregt, S. E. Loudon, A. L.W. Groot, N. J.C. Bauer, J. W. Pott, I. C. Notting, A. J. van Sorge, M. M. van Genderen, P. de Graaf, A. Y.N. Schouten-van Meeteren, P. Saeed, G. L. Porro