1. Rhode Island Hospital, Providence, USA
2. Purdue University, West Lafayette, IN, USA
3. San Francisco VA Health Care System, CA, USA
4. University of California, San Francisco, USA
5. Womack Army Medical Center, Fort Liberty, NC, USA
6. University of South Carolina, Columbia, USA
7. Brown University School of Public Health, Providence, RI, USA
8. Independent Researcher and Practitioner, Mount Shasta, CA, USA