1. VA Boston Healthcare System , Boston, MA , USA
2. Boston University School of Medicine , Boston, MA , USA
3. Pain Research, Informatics, Multimorbidities and Education (PRIME) Center, VA Connecticut Healthcare System , West Haven, CT , USA
4. Yale School of Medicine , New Haven, CT , USA
5. University of Michigan Medical School , Ann Arbor, MI , USA
6. VA Center for Health Information and Communication (CHIC) , Indianapolis, IN , USA
7. Indiana University School of Medicine , Indianapolis, IN , USA
8. Regenstrief Institute , Indianapolis, IN , USA
9. VA Ann Arbor Center for Clinical Management Research , Ann Arbor, MI , USA