1. University of California-San Francisco, San Francisco, California
2. King Chulalongkorn Memorial Hospital, Bangkok, Thailand
3. University of Texas Southwestern, Dallas, Texas
4. University of North Carolina, Chapel Hill, North Carolina
5. University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
6. Cleveland Clinic, Cleveland, Ohio
7. University of British Columbia, Vancouver, British Columbia, Canada
8. University of Florida Health, Gainesville, Florida
9. Dartmouth-Hitchcock, Lebanon, New Hampshire
10. Penn State Health, Hershey, Pennsylvania
11. University of California-San Diego, San Diego, California
12. University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin