1. Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire
2. Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
3. Atrium Health Musculoskeletal Institute, Charlotte, North Carolina
4. Keck School of Medicine, University of Southern California, Los Angeles, California
5. University of Washington Harborview Medical Center, Seattle, Washington
6. Vanderbilt University Medical Center, Nashville, Tennessee
7. Indiana University School of Medicine, Indianapolis, Indiana and
8. University of Maryland School of Medicine, Baltimore, Maryland