1 Divisão de Endocrinologia e Diabetes, Hospital Agamenon Magalhães, Faculdade de Ciências Médicas, Universidade de Pernambuco, Recife, PE, Brasil, francisco.bandeira@upe.br.
2 Department of Medicine, Endocrinology Division, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA.