1. Institute of Clinical Medicine, University of Oslo , Oslo , Norway
2. Anabolic Androgenic Steroid Research Group, Section for Clinical Addiction Research, Division of Mental Health and Addiction, Oslo University Hospital , Oslo , Norway
3. ProCardio Center for Research-Based Innovation, Department of Cardiology, Rikshospitalet, Oslo University Hospital , Sognsvannsveien 20, 0372 Oslo , Norway
4. National Centre for Epilepsy, Section for Clinical Psychology and Neuropsychology, Oslo University Hospital , Oslo , Norway
5. Norwegian Doping Control Laboratory, Department of Pharmacology, Oslo University Hospital , Oslo , Norway