1. These authors contributed equally to this article
2. Altona Children’s Hospital, Department of Pulmonology, Hamburg, Germany
3. University Medical Centre Hamburg-Eppendorf, Department of Pediatrics, Hamburg, Germany
4. University Children`s Hospital Bochum- Germany, Department of Pulmonology, Bochum, Germany
5. Center of Applied Sciences of Health (CASH), Leuphana University, Lueneburg, Germany
6. German Red Cross, Chapter Hamburg-Harburg, Hamburg, Germany