[1] Cleveland Clin, Cole Eye Inst, Dept Ophthalm Oncol, 9500 Euclid Ave, Cleveland, OH 44195 USA
[2] Hadassah Univ Hosp, Dept Ophthalmol, IL-91120 Jerusalem, Israel
[3] Univ Padua, Dept Ophthalmol, Padua, Italy
[4] Karolinska Univ, St Eriks Eye Hosp, Stockholm, Sweden
[5] Univ Nottingham, Div Ophthalmol & Visual Sci, Nottingham NG7 2RD, England