Duke Clinical Research Unit, Durham, North Carolina, United States
Centre Paradis-Monticelli, Marseille, France
Centre Rabelais, Lyon, France
Hopitaux Universitaires, Strasbourg, France
Wilmer Eye Institute, Baltimore, Maryland, United States
Ophthalmic Consultants of Boston, Boston, Massachusetts, United States
Retina Consultants of Houston, Houston, Texas, United States