1 Department of Psychology, University of Oslo, Oslo, Norway; Modum Bad Psychiatric Hospital, Vikersund, Norway. Electronic address: s.u.johnson@psykologi.uio.no.
2 Department of Psychology, University of Oslo, Oslo, Norway; Modum Bad Psychiatric Hospital, Vikersund, Norway; Department of Psychology, Norwegian University of Science and Technology, Trondheim, Norway.
3 Division of Mental Health and Addiction, Oslo University Hospital, Oslo, Norway; Institute of Clinical Medicine, Medical Faculty, University of Oslo, Oslo, Norway.
4 Department of Psychology, University of Oslo, Oslo, Norway; Asto Clinics, United Kingdom.