1. From the Department of Pathology, Stanford University School of Medicine, Stanford, California;
2. Institut de Recherche en Ophthalmologie, Sion, Switzerland;
3. Institut de Recherche en Ophthalmologie, Sion, Switzerland; the 4Department of Ophthalmology, University of Lausanne, Lausanne, Switzerland; and 5Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne, Switzerland.