Helge Waal ( born 1940) Specialist in psychiatry, Professor Emeritus at the Norwegian Centre for Addiction Research, University of Oslo and medical adviser at the Department of Specialised Outpatients Services in Centre for Addiction Treatment, Oslo University Hospital
The author has completed the ICMJE form and declares no conflicts of interest.
Norwegian Centre for Addiction Research
Institute of Clinical Medicine
University of Oslo
Centre for Addiction Treatment
Oslo University Hospital