[1] Minist Salud & Ambiente, ANLIS, Inst Nacl Parasitol Dr Mario Fatala Chaben, RA-1063 Buenos Aires, DF, Argentina
[2] Univ Buenos Aires, Fac Farm & Bioquim, IDEHU, RA-1113 Buenos Aires, DF, Argentina
[3] Hosp Clin Buenos Aires, Ctr Alergia, Buenos Aires, DF, Argentina