aCenter for Perioperative Optimization, Department of Surgery, Herlev Hospital, University of Copenhagen, Copenhagen, DenmarkbDepartment of Surgery, Horsens Hospital, Horsens, DenmarkcDepartment of Surgery, Bispebjerg Hospital, Copenhagen, DenmarkdUniversity Hospital Aalborg, Dagkirurgisk Center Hobro, Hobro, DenmarkeDepartment of Surgery, Sygehus Lillebælt, Kolding Hospital, Kolding, Denmark