[1] Charite, Dept Pediat Pneumol & Immunol, Campus Virchow Hosp, D-13353 Berlin, Germany
[2] Charite, Allergy Ctr, D-13353 Berlin, Germany
[3] Med Univ Graz, Dept Dermatol & Venereol, Graz, Austria
[4] City Hosp, Dept Pediat, Braunschweig, Germany
[5] Municipal Hosp St Georg, Div Pediat, Dept Pediat Rheumatol Immunol & Infectiol, Leipzig, Germany
[6] Univ Childrens Hosp, Basel, Switzerland
[7] Univ Munich, Dr von Haunersches Childrens Hosp, Inner City Med Ctr, Munich, Germany
[8] Hannover Med Sch, Dept Immunol & Rheumatol, D-3000 Hannover, Germany
[9] Johann Wolfgang Goethe Univ Hosp, Frankfurt, Germany
[10] Univ Bern, Inst Pharmacol, Bern, Switzerland
[11] Univ Hosp Mainz, Dept Dermatol, Mainz, Germany