[1] Diakonessenhuis Utrecht, Dept Ophthalmol, Zeist, Netherlands
[2] St Antonius Hosp, Dept Gynaecol, Nieuwegein, Utrecht, Netherlands
[3] Maastricht Univ, Univ Eye Clin, Med Ctr MUMC, Maastricht, Netherlands
[4] Amsterdam UMC, Dept Ophthalmol, Locat AMC, Meibergdreef 9, NL-1105 AZ Amsterdam, Netherlands
[5] Oogklin Maastricht, Maastricht, Netherlands