1. Clinic for Child and Adolescent Psychiatry/Psychotherapy, Ulm University, Ulm, Germany
2. Child and Youth Welfare Services, Florack & Skrobanek GbR, Altheim, Germany
3. Department of Psychosomatic Medicine and Psychotherapy, Klinikum Stuttgart, Stuttgart, Germany
4. CF Centre, University Hospital of Frankfurt, Frankfurt am Main, Germany
5. CF centre Hamburg-Altona, Hamburg, Germany
6. Department of Pediatric Pulmonology and Neonatology, Hannover Medical School, Hannover, Germany
7. Children’s Hospital, University Hospital of Würzburg, Würzburg, Germany
8. Mukoviszidose Institut gGmbH, Bonn, Germany