1. Department of Cardiology, Shenzhen Nanshan People's Hospital, Shenzhen, Guangdong 518000, P.R. China
2. Department of Cardiology, Shenzhen Hospital of Integrated Traditional Chinese and Western Medicine, Shenzhen, Guangdong 518000, P.R. China
3. Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 51027, USA