1. Ciccarone Centre for the Prevention of Cardiovascular DiseaseJohns Hopkins University School of Medicine Baltimore Maryland United States
2. CGH Medical Center Sterling Illinois United States
3. Oregon Health and Science University Portland Oregon United States
4. University of CaliforniaIrvine School of Medicine Irvine California United States
5. Optum Eden Prairie Minnesota United States
6. Kaiser Permanente Center for Health Research Portland Oregon United States