1. Department of Internal Medicine, Yale School of Medicine, New Haven, CT, USA.
2. VA Connecticut Healthcare System, Pain Research, Informatics, Multimorbdities and Education (PRIME) Center, West Haven, CT, USA.
3. James A. Haley Veterans Hospital, Tampa, FL, USA.
4. University of South Florida, College of Public Health, Tampa, FL, USA.
5. Oregon Health and Science University, Portland, OR, USA.
6. VA Portland Health Care System, Portland, OR, USA.
7. Department of Emergency Medicine, Yale School of Medicine, New Haven, CT, USA.
8. Florida International University, Miami, FL, USA.
9. Departments of Psychiatry, Neurology and Psychology, Yale University, New Haven, CT, USA.