1. Dermatological Allergology, Allergie-Centrum-Charité, Department of Dermatology and Allergy, Charité – Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany;
2. Department of Paediatrics, Section of Allergy and Immunology, University of the Philippines-Philippine General Hospital, Manila, The Philippines;
3. Department of Medicine and Surgery, University of Parma, Parma, Italy;
4. Paediatric Department, University of Szeged, Szeged, Hungary