1. Department of Health and Exercise Science, Wake Forest University, Winston-Salem, NC 27109, USA
2. Wake Forest School of Medicine, Wake Forest University, Winston-Salem, NC 27157, USA
3. Department of Internal Medicine, The University of Tennessee-Memphis, Memphis, TN 38103, USA
4. Section on Clinical, Behavioral & Outcomes Research, Harvard Medical School, Boston, MA 22222, USA
5. Department of Health and Physical Activity, University of Pittsburgh, Pittsburgh, PA 15203, USA
6. Indian Health Service/ACKCO, Inc/NIDDK, Northern Navajo Medical Center, Shiprock, NM 87420, USA
7. Diabetes Epidemiology and Clinical Research Section, National Institutes of Health, National Institute of Diabetes and Digestive and Kidney Diseases, Phoenix, AZ 85014, USA
8. Department of Cardiology, School of Medicine, Johns Hopkins University, Baltimore, MD 21224, USA