1Department of Epidemiology, Harvard School of Public Health, Boston, MA, USA
2School of Public Health, Capital Medical University, Beijing 100000, China
3Department of Thoracic Surgery, Beijing Chest Hospital, Beijing 100000, China
4State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Beijing 100037, China
5Department of Cardiac Surgery, Fuwai Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100037, China
6Center for Health Statistics, National Health and Family Planning Commission of China, Beijing 100037, China