1. Endocrinology and Internal Medicine Service, Institute of Integral Medicine Professor Fernando Figueira (IMIP), Recife, Brazil.
2. Department of Internal Medicine, School of Medical Sciences, University of Pernambuco, Recife, Brazil.
3. Department of Tropical Medicine, Federal University of Pernambuco, Recife, PE, Brazil, and Postgraduate Studies Center, University of Pernambuco, Recife, Brazil.
4. Centro de Pesquisas Aggeu Magalhães, FIOCRUZ, Recife, Brazil.