1. VA New England Mental Illness Research and Education Center, West Haven, Connecticut, USA;
2. Department of Psychiatry, Yale School of Medicine, New Haven, Connecticut, USA;
3. Advanced PACT Pain Clinic, VA Hampton Medical Center, Hampton, Virginia, USA;
4. Department of Physical Medicine and Rehabilitation, Eastern Virginia Medical School, Norfolk, Virginia, USA;
5. Department of Psychiatry, Eastern Virginia Medical School, Norfolk, Virginia, USA