1. Department of Cardiology, ProCardio Center for Research Based Innovation, Rikshospitalet, Oslo University Hospital , Sognsvannsveien 20, Postbox 4950 Nydalen, 0424 Oslo , Norway
2. Ïnstitute of Clinical Medicine, Faculty of Medicine, University of Oslo , Oslo , Norway
3. Anabolic Androgenic Steroid Research Group, Section for Clinical Addiction Research, Division of Mental Health and Addiction, Oslo University Hospital , Oslo , Norway