1. CHAllenges in Managing and Preventing Pain (CHAMPP) Clinical Research Center, Division of General Internal Medicine, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
2. Center for Research on Health Care, Division of General Internal Medicine, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
3. Department of Psychiatry, University of Michigan Medical School, Ann Arbor, MI, USA
4. Center for Clinical Management Research, VA Ann Arbor Healthcare System, Ann Arbor, MI, USA
5. Division of General Internal Medicine & Geriatrics, Section of Addiction Medicine, General Internal Medicine, Oregon Health & Science University, Portland, OR, USA
6. Department of Family Medicine and Community Health, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
7. Center for Biostatistics and Qualitative Methodology, Division of General Internal Medicine, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA