1. Virginia Commonwealth University Richmond Virginia USA
2. University of Pittsburgh Graduate School of Public Health Pittsburgh Pennsylvania USA
3. Massachusetts General Hospital Harvard Medical School Boston Massachusetts USA
4. Washington University School of Medicine and John Cochran VA Medical Center St. Louis Missouri USA
5. National Institute of Health Bethesda Maryland USA
6. University of California San Francisco San Francisco California USA
7. University of Texas Southwestern and Parkland Health & Hospital System Dallas Texas USA
8. Biobehavioral Research Lab Virginia Commonwealth University School of Nursing
9. National Cancer Institute Bethesda Maryland USA
10. Johns Hopkins University Baltimore Maryland USA
11. University Health Network Toronto Ontario Canada