1. Department of Pediatric Respiratory Medicine, Immunology and Critical Care Medicine Charité – Universitätsmedizin corporate member of Freie Universität Berlin and Humboldt‐Universität Berlin Berlin Germany
2. Department of Immunology Labor Berlin – Charité Vivantes GmbH Berlin Germany
3. Department of Pediatric Allergology German Red Cross Clinic Westend Berlin Germany
4. Children’s Hospital “Altona” Hamburg Germany
5. Pediatric allergology practice Stuttgart
6. Children's Hospital Osnabrück Germany
7. Children's Hospital University of Cologne Cologne Germany
8. Division of Pediatric Dermatology and Allergology Children's Hospital Auf der Bult Hannover Germany
9. Children‘s Hospital Evangelisches Krankenhaus Düsseldorf Formerly Marien hospital Wesel Wesel Germany
10. Department for Pediatrics St. Marien‐Hospital Bonn Germany