1. Department of Psychiatry, Yale School of Medicine, New Haven, Connecticut, USA
2. Pain Treatment Services, The APT Foundation, Inc., New Haven, Connecticut, USA
3. Department of Internal Medicine, Yale School of Medicine, New Haven, Connecticut, USA
4. Department of Psychology, University of Bridgeport, Bridgeport, Connecticut, USA
5. Yale School of Public Health, New Haven, Connecticut, USA.
6. Department of Psychology, New York University, New York, New York, USA