1 Department of Cardiology, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China.
2 Department of Cardiology, Maoming People's Hospital, Maoming 525000, China.
3 Department of Cardiology, Dongguan People's Hospital, Dongguan 523059, China.
4 Department of Critical Care Medicine, Guangdong Geriatric Institute, Guangdong Provincial People's Hospital and Guangdong Academy of Medical Sciences, Guangzhou 510080, China.