1. Northwestern University; Chicago Illinois United States
2. University of California-Los Angeles Medical Center; Los Angeles California United States
3. GlaxoSmithKline; Philadelphia Pennsylvania United States
4. Duke University Medical Center, Durham, and Department of Clinical Research; Campbell University School of Pharmacy, Research Triangle Park; North Carolina United States
5. The Ohio State University, Columbus; Ohio United States
6. George M. and Linda H. Kaufman Center for Heart Failure; Cleveland Clinic Foundation; Cleveland Ohio United States
7. University of California San Diego-Hillcrest Medical Center; San Diego California United States
8. Duke University Medical Center/Duke Clinical Research Institute; Durham North Carolina United States
9. Baylor Heart and Vascular Institute; Baylor University Medical Center; Dallas Texas United States