1. The State Key Laboratory of Cardiovascular Diseases, Sino-German Laboratory for Molecular Medicine, FuWai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, People's Republic of China
2. Department of Cardiovascular Surgery, China-Japan Friendship Hospital, Beijing 100029, People's Republic of China
3. Department of Neurology, Huainan First People's Hospital, Huai Nan 232007, People's Republic of China
4. Department of Nutrition and Epidemiology, Harvard School of Public Health, Boston, MA 02115, U.S.A.