Department of Computer Science - DCC, University of São Paulo, Rua do Matão, 1010, CEP 05508-090 São Paulo, SP, Brazil. mina.cintho@usp.br.|Sangue Foundation, Health State Secretary, Department of Molecular Biology, Serology Division, Av Dr Enéas de Carvalho Aguiar, Cerqueira Cesar, CEP 05403-000 São Paulo, 155, SP, Brazil. sabinoec@gmail.com.|Federal University of São Paulo, Rua Pedro de Toledo, São Paulo, 669, CEP 04039-032, SP, Brazil. rsdiaz@catg.com.br.|Department of Computer Science - DCC, University of São Paulo, Rua do Matão, 1010, CEP 05508-090 São Paulo, SP, Brazil. cesar@ime.usp.br.|Sangue Foundation, Health State Secretary, Department of Molecular Biology, Serology Division, Av Dr Enéas de Carvalho Aguiar, Cerqueira Cesar, CEP 05403-000 São Paulo, 155, SP, Brazil. jef@ime.usp.br.