[1] LIBRA Fdn, Buenos Aires, DF, Argentina
[2] Univ Antioquia, Medellin, Colombia
[3] Univ Nacl La Plata, La Plata, Buenos Aires, Argentina
[4] Univ Fed Sao Paulo, Sao Paulo, Brazil
[5] Ctr Med Docente La Trinidad, Caracas, Venezuela
[6] Univ Cincinnati, Dept Internal Med, Cincinnati, OH USA
[7] Univ Cincinnati, Div Immunol, Allergy Sect, Cincinnati, OH USA
[8] Univ Autonoma Nuevo Leon, Hosp Dr Jose Eleuterio Gonzalez, Monterrey, Mexico
[9] Hosp Cent, Inst Previs Social, Asuncion, Paraguay
[10] Univ Nacl Pedro Henriquez Urena, Santo Domingo, Dominican Rep
[11] Hosp San Angel, Mexico City, DF, Mexico
[12] Univ Rosario, Rosario, Argentina
[13] Inst ALAS, Salta, Argentina
[14] Fdn Valle del Lili, Allergy Unit, Cali, Colombia
[15] Nuevo Hosp San Roque, Cordoba, Argentina
[16] UNA, Fac Ciencias Med, Hosp Clin, Unidad Alergia, Asuncion, Paraguay
[17] Univ Sao Paulo, Clin Immunol & Allergy Div, Sao Paulo, Brazil
[18] Policlin Neuquen, Inst Neuquino Alergia, Neuquen, Argentina
[19] Univ Estado Rio De Janeiro, Rio De Janeiro, Brazil
[20] Univ Espiritu Santo, Guayaquil, Ecuador