Iago Jorge1, Igor Pietrobom2, Aécio Góis2. 1. Department of Internal Medicine, Federal University of São Paulo, Rua Napoleão de Barros, 715, São Paulo, SP, CEP 04024-002, Brazil. iagofjorge@yahoo.com.br. 2. Department of Internal Medicine, Federal University of São Paulo, Rua Napoleão de Barros, 715, São Paulo, SP, CEP 04024-002, Brazil.