Protection of personal information All personal information on the patient's identities are protected by the "Lov om behandling af personlige oplysninger". A unique subject ID number will be subscribed to all patients in order to anonymize data. The identification key (ID to personal information) will be encrypted and stored securely and separately from the unique ID number on a secure database. In this way no information on patient´s can be assigned to the ID number. All data is automatically backed up on a secure server. Questionnaires is completed online and automatically uploaded with the ID number to the secure data base.