1. Division of General Internal Medicine and Geriatrics, Department of Medicine, Section of Addiction Medicine Oregon Health & Science University Portland Oregon USA
2. Division of Epidemiology, College of Public Health The Ohio State University Columbus Ohio USA
3. Department of Family Medicine and Community Health, School of Medicine and Public Health University of Wisconsin Madison Wisconsin USA
4. Division of General Internal Medicine University of Washington Seattle Washington USA
5. Rollins School of Public Health Emory University Atlanta Georgia USA
6. Department of Population Science and Policy Southern Illinois University School of Medicine Springfield Illinois USA
7. Department of Medicine, School of Medicine and Public Health University of Wisconsin Madison Wisconsin USA