The incidence of visual impairment due to retinopathy of prematurity (ROP) and concomitant disabilities in the Netherlands: a 30 year overview - van Sorge, A J; Termote, J U; de Vries, M J; Boonstra, F N; Stellingwerf, C; Schalij-Delfos, N E (Br J Ophthalmol, 2011)