1 Ribeirão Preto Medical School, University of São Paulo, Av. dos Bandeirantes 3900, 14049-900, Ribeirão Preto, SP, Brazil.
2 Ribeirão Preto Medical School, University of São Paulo, Av. dos Bandeirantes 3900, 14049-900, Ribeirão Preto, SP, Brazil. Electronic address: jose.raniery@hc.fm.usp.br.