1 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.
2 Ribeirão Preto Medical School, University of São Paulo, Av. dos Bandeirantes 3900, 14049-900 Ribeirão Preto, SP, Brazil.
3 School of Engineering, University of São Paulo, Av. Prof. Luciano Gualberto 158, 05508-150 São Paulo, SP, Brazil.