[1] Univ Estadual Campinas, Fac Ciencias Med, Dept Clin Med, Campinas, SP, Brazil
[2] Fundaco Oswaldo Cruz, Dept Parasitol Microbiol & Immunol, Inst Pesquisas Clin Evandro Chagas, Rio De Janeiro, Brazil
[3] Escola Paulista Med, Dept Med, BR-04023 Sao Paulo, Brazil
[4] Univ Sao Paulo, Fac Med, Dept Molestias Infecciosas & Parasitarias, Sao Paulo, Brazil