1. Birmingham VA Medical Center, Birmingham, Alabama, USA
2. University of Alabama at Birmingham, Birmingham, Alabama, USA
3. Georgia Highlands College, Rome, Georgia, USA
4. University of Missouri, St. Louis, Missouri, USA
5. VA Salt Lake City Health Care System, Salt Lake City, Utah, USA
6. The University of Utah, Salt Lake City, Utah, USA
7. VA Greater Los Angeles Healthcare System, Los Angeles, California, USA
8. University of California, Los Angeles, Los Angeles, California, USA
9. Boston University School of Medicine, Boston, Massachusetts, USA
10. Santa Clara University, Santa Clara, California, USA