1. Department of Anaesthesiology; University of Copenhagen, Herlev Hospital; Herlev Denmark
2. Department of Anaesthesia, Centre of Head and Orthopaedics; University of Copenhagen, Rigshospitalet; Copenhagen Denmark
3. Department of Surgery; University of Copenhagen, Herlev Hospital; Herlev Denmark
4. Department of Anaesthesiology; Nordsjaellands Hospital, University of Copenhagen; Capital Region of Denmark Denmark
5. Department of Gynaecological and Obstetrics; University of Copenhagen, Herlev Hospital; Herlev Denmark
6. Department of Surgery; Nordsjaellands Hospital, University of Copenhagen; Capital Region of Denmark Denmark