1. Department of Respiratory Medicine, Copenhagen University Hospital – Hvidovre, Copenhagen, Denmark
2. Department of Obstetrics and Gynaecology, the Fertility Clinic, Copenhagen University Hospital, Hvidovre, Copenhagen, Denmark
3. Institute of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
4. Department of Otorhinolaryngology and Head & Neck Surgery, Rigshospitalet, Copenhagen, Denmark