[1] Univ Fed Sao Paulo, Dept Pediat, Div Allergy Clin Immunol & Rheumatol, Sao Paulo, Brazil
[2] Univ Salvador, Sch Med, Div Immunol, Buenos Aires, DF, Argentina
[3] Clin Santa Isabel, Div Allergy & Immunol, Buenos Aires, DF, Argentina
[4] Ctr Med Docente La Trinidad, Allergy & Clin Immunol Dept, Caracas, Venezuela
[5] Clin El Avila, Allergy & Immunol Dept, Caracas, Venezuela
[6] Univ Montes Claros, Dept Internal Med, Montes Claros, MG, Brazil
[7] Univ Fed Parana, Dept Pediat, BR-80060000 Curitiba, Parana, Brazil
[8] Natl Univ Rosario, Fac Med Sci, Div Med Pathol Pulmonol Allergy & Immunol 2, Rosario, Santa Fe, Argentina
[9] Fed Fac Fdn Med Sci Porto Alegre, Div Immunol & Immunopathol, Rio Grande Do Sul, Brazil