[1] Royal Dutch Visio de Brink, Groningerstr 15 Vries, Huizen, Netherlands
[2] Univ Groningen, Fac Behav & Social Sci, Dept Pedag & Educ Sci, Unit Special Needs Educ & Youth Care, Grote Rozenstr 38, Groningen, Netherlands
[3] Vrije Univ Amsterdam, Amsterdam UMC, Ophthalmol, Amsterdam Publ Hlth Res Inst, De Boelelaan 1117, Amsterdam, Netherlands
[4] Hanze Univ Appl Sci Groningen, Zernikepl 23, Groningen, Netherlands
[5] Hanzehogesch Groningen, Res Grp Hlth Ageing Allied Hlth Care & Nursing, Petrus Driessenstr 3, Groningen, Netherlands