1. Department of Cardiology, Heart Center, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, People’s Republic of China
2. Department of Internal Medicine, Raoping County People's Hospital, Chaozhou, Guangdong, People’s Republic of China
3. Department of Cardiology, Boai Hospital of Zhongshan, Southern Medical University, Zhongshan, People’s Republic of China
4. Department of Neurology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, People’s Republic of China