[1] Univ Fed Bahia, Salvador, BA, Brazil
[2] Univ Fed Sao Paulo, Sao Paulo, Brazil
[3] Univ Fed Rio de Janeiro, Rio De Janeiro, Brazil
[4] Univ Sao Paulo, BR-14049 Ribeirao Preto, Brazil
[5] Univ Fed Minas Gerais, Felicio Rocho Hosp, Belo Horizonte, MG, Brazil
[6] Univ Sao Paulo, Fac Med, Sao Paulo, Brazil
[7] Fundacao Fac Fed Ciencias Med, Rio Grande Do Sul, Brazil
[8] Univ Fed Pernambuco, Recife, Brazil
[9] Univ Fed Paraiba, BR-58059900 Joao Pessoa, Paraiba, Brazil
[10] Univ Fed Parana, BR-80060000 Curitiba, Parana, Brazil
[11] Hosp Base Brasilia, Brasilia, DF, Brazil
[12] Univ Sao Paulo, Sao Paulo, Brazil