1. Division of Endocrinology, Department of Medicine, Escola Paulista de Medicina, Universidade Federal de São Paulo, 04021-001 São Paulo, Brazil
2. Department of Medicine, Robert Wood Johnson Medical School, Robert Wood Johnson University Hospital, Rutgers, The State University of New Jersey. New Brunswick, New Jersey 08901
3. Division of Endocrinology and Metabolism, Department of Medicine, Johns Hopkins University School of Medicine, Johns Hopkins University, Baltimore, Maryland 21205
4. Department of Pediatrics, Johns Hopkins University School of Medicine, Johns Hopkins University, Baltimore, Maryland 21205