[1] Evidence Based Hlth Care Ltd, Edinburgh, Midlothian, Scotland
[2] UCL, London, England
[3] Padua Gen Univ Hosp, Dept Women & Child Hlth, Food Allergy Referral Ctr Veneto Reg, Padua, Italy
[4] Univ Hosp Southampton NHS Fdn Trust, NIHR Resp Biomed Res Unit, St Marys Hosp, David Hide Asthma & Allergy Res Ctr, Southampton, NY USA
[5] Univ Southampton, Fac Med, Southampton, Hants, England
[6] Odense Univ Hosp, Hans Christian Andersen Childrens Hosp, Odense, Denmark
[7] Hosp Clin San Carlos, Jefe Serv Alergia, Madrid, Spain
[8] Charite, Berlin, Germany
[9] Univ Edinburgh, Allergy & Resp Res Grp, Asthma UK Ctr Appl Res, Usher Inst Populat Hlth Sci & Informat, Edinburgh, Midlothian, Scotland