[1] Univ Buenos Aires, Sch Med, Dept Infect Dis, RA-1053 Buenos Aires, DF, Argentina
[2] Univ Buenos Aires, Sch Med, Dept Pharmacol, RA-1053 Buenos Aires, DF, Argentina
[3] Juan Fernandez Hosp, Dept Infect Dis, Buenos Aires, DF, Argentina
[4] Huesped Fdn, Buenos Aires, DF, Argentina
[5] Hosp Italiano Buenos Aires, Infect Dis Sect, Buenos Aires, DF, Argentina
[6] Ctr Med Caracas, Dept Infect Dis, Caracas, Venezuela
[7] Cent Univ Venezuela, Hosp Vargas Caracas, Dept Infect Dis, Caracas, Venezuela
[8] Pontificia Univ Javeriana, Hosp Univ San Ignacio, Unidad Infectiol, Bogota, Colombia