1. From the Departments of Medicine and 2Ophthalmology, Boston University School of Medicine, Boston, Massachusetts;
2. Diabetes and Metabolism Research Unit, Institut de Recerca, Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona, Barcelona, Spain; and 5CIBER for Diabetes and Associated Metabolic Diseases (CIBERDEM), Instituto de Salud Carlos III, Barc