1. Centre Hospitalo-Universitaire (CHU) Saint-Pierre, Université Libre de Bruxelles, Brussels, Belgium
2. Hadassah-Hebrew University Medical Centre, Jerusalem, Israel
3. Hôpital Universitaire Genève, Geneva, Switzerland
4. Hôpital Universitaire La Pitié Salpêtrière, Paris, France
5. Clinique St Luc, Université Catholique de Louvain, Brussels, Belgium
6. Institut Bordet, Université Libre de Bruxelles, Brussels, Belgium
7. Department of Ophthalmology, Emory University School of Medicine, Atlanta, Georgia, USA
8. National Institute of Heath, NEI, Laboratory of Pathology, Bethesda, Maryland, USA