[1] Univ Buenos Aires, Fac Med, Lab Inmunogenet, Hosp Clin, Buenos Aires, DF, Argentina
[2] Univ Buenos Aires, Fac Med, Dept Microbiol, Buenos Aires, DF, Argentina
[3] Fdn Invest & Prevenc Canc, Ctr Invest Oncol, Buenos Aires, DF, Argentina
[4] Fdn Inst Leloir, Buenos Aires, DF, Argentina