1. Department of Psychiatry and Behavioral Sciences; Johns Hopkins University School of Medicine; Baltimore Maryland USA
2. Welch Center for Prevention, Epidemiology and Clinical Research, Johns Hopkins University; Baltimore Maryland USA
3. Pennington Biomedical Research Center, Louisiana State University; Baton Rouge Louisiana USA
4. The Center for Health Research, Kaiser Permanente Northwest; Portland Oregon USA
5. Division of General Internal Medicine; Johns Hopkins University; Baltimore Maryland USA
6. Department of Kinesiology; Towson University; Towson Maryland USA
7. Klein Buendel, Inc; Golden Colorado USA
8. Division of Nephrology/Department of Medicine; Duke University Medical Center; Durham North Carolina USA
9. Duke Hypertension Center and Sarah W. Stedman Nutrition and Metabolism Center, Duke University Medical Center; Durham North Carolina USA
10. National Heart, Lung, and Blood Institute; Bethesda Maryland USA