1 Allergy Unit, 2nd Department of Dermatology and Venereology, Medical School, National and Kapodistrian University of Athens, Attikon University Hospital, Athens, Greece.
2 Institute for Allergology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universitätzu Berlin, Berlin, Germany.
3 Department of Dermatology and Venerology, Kepler University Hospital, Linz, Austria.
4 Division of Allergy, Clinical Immunology and Rheumatology, Department of Pediatrics, Federal University of São Paulo, São Paulo, Brazil.
5 Department of Dermatology, Koç University School of Medicine, Istanbul, Turkey.
6 London Allergy and Immunology Centre, London, United Kingdom.