1 Internal Medicine, Hospital das Clinicas da Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil mcarmo@waymail.com.br.
2 Post Graduation Program in Infectious Diseases and Tropical Medicine, School of Medicine, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
3 Non Communicable Diseases, Instituto Nacional de Saude, Maputo, Mozambique.