1. Department of Pediatric Pneumology and Immunology; Charité Universitätsmedizin Berlin; Berlin Germany
2. Icahn School of Medicine at Mount Sinai; New York NY USA
3. Institute for Social Medicine, Epidemiology, and Health Economics; Charité Universitätsmedizin Berlin; Berlin Germany
4. Department of Pediatric Allergology; German Red Cross Hospital; Berlin Germany
5. Department for Pediatrics, St. Marien-Hospital; Bonn Germany
6. Department of Pediatrics, Waldburg-Zeil Clinic; Wangen Germany
7. Department of Pediatrics, Marien-Hospital; Wesel Germany
8. Department of Pediatrics, Sana Klinikum Lichtenberg; Berlin Germany
9. Pediatric Praxis; Stuttgart Germany
10. Childrens Hospital; Osnabrück Germany
11. Catholic Childrens Hospital Wilhemsstift; Hamburg Germany