[1] Hannover Med Sch, D-3000 Hannover, Germany
[2] Cedars Sinai Med Ctr, Los Angeles, CA 90048 USA
[3] St Louis Univ, Sch Med, St Louis, MO USA
[4] AO Fatebenefratelli & Oftalm, Milan, Italy
[5] Vall dHebron Univ Hosp, Barcelona, Spain
[6] Hosp Univ Austral, Pilar, Argentina
[7] Merck, Whitehouse Stn, NJ USA
[8] Univ Henri Poincare Nancy, Vandoeuvre Les Nancy, France