1. University of Virginia, Lynchburg, USA
2. Mary Washington Hospital, Fredericksburg, VA, USA
3. Mercy Clinic, St. Louis, MO, USA
4. Mayo Clinic Health System, Eau Claire, WI, USA
5. Keck school of Medicine of USC/LAC+USC Medical Center, CA, USA
6. Kaweah Delta Medical Center, Visalia, CA, USA