The natural history of Leber congenital amaurosis and cone–rod dystrophy associated with variants in the GUCY2D gene by Hahn, LC, Georgiou, M, Almushattat, H, van Schooneveld, MJ, de Carvalho, ER, Wesseling, NL, Ten Brink, JB, Florijn, RJ, Lissenberg-Witte, BI, Strubbe, I, van Cauwenbergh, C, de Zaeytijd, J, Walraedt, S, de Baere, E, Mukherjee, R, McKibbin, M, Meester-Smoor, MA, Thiadens, AAHJ, Al-Khuzaei, S, Akyol, E, Lotery, AJ, van Genderen, MM, Norel, JO-V, Ingeborgh van den Born, L, Hoyng, CB, Klaver, CCW, Downes, SM, Bergen, AA, Leroy, BP, Michaelides, M, Boon, CJF