1. Department of Cardiac Surgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
2. Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY, USA
3. Department of Cardiology, Guangzhou Panyu Central Hospital, Guangzhou, China
4. Department of Cardiothoracic Surgery ICU, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China