1. Department of Medicine Huddinge; Division of Infectious Diseases; Karolinska Institutet; Karolinska University Hospital Huddinge; Stockholm Sweden
2. Capio Maria; Addiction Centre; Stockholm Sweden
3. Stockholm Needle Exchange; Stockholm Centre for Dependency Disorders; Stockholm Sweden
4. Study Program of Medicine; Karolinska Institutet; Stockholm Sweden
5. Centre for Psychiatry Research; Department of Clinical Neuroscience; Karolinska Institutet; Stockholm Sweden
6. Stockholm Centre for Dependency Disorders; Stockholm Health Care Services; Stockholm County Council; Stockholm Sweden