Yolanda Schrank1, Miguel Madeira2. 1. Division of Endocrinology and Metabolism, Department of Internal Medicine, Bonsucesso Federal Hospital, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil. 2. Division of Endocrinology and Metabolism, Department of Internal Medicine, Bonsucesso Federal Hospital and Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil. Electronic address: migmadeira@gmail.com.