[1] Libra Fdn, Buenos Aires, DF, Argentina
[2] Univ Nacl La Plata, Fac Cs Med, La Plata, Argentina
[3] Ctr Medicodocente Trinidad, Dept Alergia & Inmunol Clin, Caracas, Venezuela
[4] Univ Cincinnati, Coll Med, Dept Internal Med, Div Immunol,Allergy Sect, Cincinnati, OH USA
[5] Nuevo Hosp San Roque, Serv Alergia & Inmunol, Cordoba, Argentina
[6] Ayre Fdn, Alas Med Inst, Salta, Argentina
[7] Natl Univ Salta, Fac Med, Salta, Argentina
[8] Catholic Univ Salta, Sch Hlth Sci, Salta, Argentina