1 Department of Cardiology, West China Hospital of Sichuan University, Chengdu, China.
2 Department of Cardiology, West China Hospital of Sichuan University, Chengdu, China; Department of Internal Medicine, The Affiliated Hospital of Xizang Minzu University, Xianyang City, Shaanxi Province, China.
3 Department of Cardiology, West China Hospital of Sichuan University, Chengdu, China. Electronic address: xiaopingchen33@163.com.