Design The study is designed as a randomized cross-over trial. Patients will be randomized to receive either OCT or LAN for 6 months and will be then changed to the opposite therapy for 6 months without interruption between the two therapies Both OCT and LAN will be administered once every 28 days. OCT will be given intramuscularly and LAN deep subcutaneously by the patients` general practitioner or by a study nurse. At times 0, 4, 6, 10, and 12 months, the patients will be attended for clinical evaluation, at the department of Endocrinology, Odense University Hospital.