The patients are treated in groups of 7 by 2 therapists, that are either medical doctors, psychologists, psychomotoric or nurses trained in cognitive behaviour therapy and experienced in treating patients with HA with CBT. 2 teams of therapists (4 therapists) deliver the treatment, and MS only take part as a therapist if necessary. The therapists are during the project supervised regularly from an external psychologist. The group therapy includes 12 weekly meetings of 3 hours excl. a 15 minutes break and a booster-meeting of 3 hours delivered 3 month after end of treatment. The treatment follows a written manual for each meeting, which is given to the patients at the first meeting. The treatment and manual generally consists of the CBT elements of goal setting, psychoeducation, symptom registration, relaxation training, stress management, cognitive restructuring including individual designed behavioural experiments, response prevention, exposure, relapse prevention and homework.