 All patients are given a rehabilitation plan from the hospital to engage in a 4-12 weeks rehabilitation program in one of two rehabilitations centres located on Bornholm. The rehabilitation starts with a individual consultation with an experienced physiotherapist within 3 weeks of surgery where appropriate home-exercises are revised and instructed, and shortly after the consultation the patient is enrolled in a out-patient, group-based physical therapy program, twice weekly sessions for 4-12 weeks, where the length of the program depends on the patients objective response to the physical therapy. The patients are encouraged to continue their home-based exercises parallel to the physical therapy sessions and after the culmination of the physical therapy program. At the end of the supervised physical therapy program, the involved physiotherapist will subjectively assess each patients compliance in regards to their exercise adherence to the rehabilitation the patients have undertaken. 