1. Department of Anaesthesia 4231; Centre of Head and Orthopaedics; Rigshospitalet; Copenhagen University Hospital; Copenhagen; Denmark
2. Department of Anaesthesia; Centre of Head and Orthopaedics; Section of Acute Pain Manangement and Palliative Medicine 4114; Rigshospitalet; Copenhagen University Hospital; Copenhagen; Denmark
3. Medical Department; Falck Danmark A/S; Copenhagen; Denmark