[1] Univ Southampton, Fac Med, Expt Sci Unit, Southampton, Hants, England
[2] Univ Southampton, Fac Med, Human Dev Hlth Acad Unit, Southampton, Hants, England
[3] Univ Hosp Southampton NHS Fdn Hosp, NIHR Southampton Biomed Res Ctr, Southampton, Hants, England
[4] Salford Royal Fdn Trust, Dept Dietet, Salford, Lancs, England
[5] German Rheumatism Res Ctr, Epidemiol Unit, Berlin, Germany
[6] Klaipeda Univ, Fac Hlth Sci, Klaipeda, Lithuania
[7] Landspitali Univ Hosp, Childrens Hosp, Reykjavik, Ireland
[8] Vilnius Univ, Fac Med, Clin Chest Allergol & Immunol, Vilnius, Lithuania
[9] Hosp La Paz Inst Hlth Res IdiPAZ, Dept Allergy, Madrid, Spain
[10] Pediat Hosp Bambino, Div Allergy, Rome, Italy
[11] Charite Univ Med Berlin, Dept Dermatol Venerol & Allergol, Berlin, Germany
[12] Robert Koch Inst, Dept Infect Dis Epidemiol, Berlin, Germany
[13] Med Univ Lodz, Dept Immunol & Allergy, Lodz, Poland
[14] Vilnius Univ, Clin Childrens Dis, Fac Med, Vilnius, Lithuania
[15] Natl & Kapodistrian Univ Athens, Pediat Clin 2, Allergy Unit, Athens, Greece
[16] Univ Manchester, Div Infect Immun & Resp Med, Manchester, Lancs, England
[17] Charite Univ Med Berlin, Dept Pediat Pneumol Immunol & Intens Care, Berlin, Germany
[18] Landspitali Univ Hosp, Dept Immunol, Reykjavik, Ireland
[19] Emma Childrens Hosp, Acad Med Ctr, Dept Pediat Resp Med & Allergy, Amsterdam, Netherlands
[20] Univ Groningen, Beatrix Childrens Hosp, Univ Med Ctr Groningen, Dept Paediat Pulmonol & Paediat Allergol, Groningen, Netherlands
[21] Natl & Kapodistrian Univ Athens, Pediat Clin 2, Allergy Unit, Athens, Greece
[22] Univ Manchester, Manchester Inst Biotechnol, Manchester Acad Hlth Sci Ctr, Inst Inflammat & Repair, Manchester, Lancs, England
[23] Charite Univ Med Berlin, Inst Social Med Epidemiol & Hlth Econ, Berlin, Germany
[24] Univ Wurzburg, Inst Clin Epidemiol & Biometry, Wurzburg, Germany
[25] Bavarian Hlth & Food Safety Author, State Inst Hlth, Bad Kissingen, Germany