1. The Center for Outcomes Research and Evaluation, Yale-New Haven Hospital, New Haven, Connecticut
2. Yale School of Medicine, Section of Cardiovascular Medicine, Department of Internal Medicine, New Haven, Connecticut
3. National Clinical Research Center for Cardiovascular Diseases, NHC Key Laboratory of Clinical Research for Cardiovascular Medications, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, National Center for Cardiovascular Diseases