1. Intensive Care Unit, Zhongshan People’s Hospital, Zhongshan City, Guangdong, People’s Republic of China
2. Department of Cardiology, Guangdong Second Provincial General Hospital, Guangzhou City, Guangdong, People’s Republic of China
3. Department of Cardiology, Huizhou Municipal Central People’s Hospital, Huizhou City, Guangdong, People’s Republic of China
4. Department of Cardiology, Zhongshan People’s Hospital, Zhongshan City, Guangdong, People’s Republic of China