[1] Ctr Med Docents Trinidad & Clin El Avila, Allergy & Clin Immunol Dept, Caracas, Venezuela
[2] Med Univ Graz, Dept Dermatol & Venerol, Graz, Austria
[3] Tech Univ Munich, Dept Dermatol & Allergy Biederstein, Munich, Germany
[4] Ankara Univ, Dept Chest Dis, Div Immunol & Allergy, Sch Med, Ankara, Turkey
[5] Med Univ, Dept Allergy & Clin Immunol, Porto, Portugal
[6] Northwestern Univ, Feinberg Sch Med, Div Allergy & Immunol, Dept Med, Chicago, IL 60611 USA
[7] Ctr Hosp Univ Montreal, Serv Allergy & Clin Immunol, Dept Med, Montreal, PQ, Canada
[8] Katholieke Univ Leuven, Dept Microbiol & Clin Immunol, Lab Clin Immunol, Leuven, Belgium
[9] Univ Hosp Wurzburg, Dept Dermatol & Allergy, Wurzburg, Germany