1. Division of Endocrinology and Metabolism, Sinai Hospital of Baltimore, Maryland and Serviço de Endocrinologia e Metabologia do Paraná, Hospital de Clínicas, Curitiba, Brazil
2. Division of Endocrinology and Metabolism, Sinai Hospital of Baltimore, Maryland
3. Endocrine-Metabolic Service, Department of Medicine, Walter Reed Army Medical Center, Washington, DC
4. Division of Endocrinology and Metabolism, Sinai Hospital of Baltimore, Maryland and Johns Hopkins University School of Medicine, Baltimore, Maryland