1. Lehigh Valley Health Network, Allentown, PA, USA
2. University of South Florida, Tampa, FL, USA
3. North Dakota State University, Fargo, ND, USA
4. Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ, USA
5. University of Southern California, Los Angeles, CA, USA
6. HealthLandscape, American Academy of Family Physicians, Washington, DC, USA