1. Group Practice and Centre for Pneumology, Allergy and Sleep Medicine at Red Cross Maingau Hospital, Frankfurt am Main
2. Department of Psychiatry and Psychotherapy, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen
3. Pediatric Clinic, Evangelic Hospital Hamm GmbH, Hamm
4. Medical Director emeritus, Department of Pneumology, University Hospital Freiburg