1. Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
2. Department of Cardiology, Huangshi Center Hospital, Affiliated Hospital of Hubei Polytechnic University, Huangshi, Hubei 435000, P.R. China
3. Department of Cardiology, Wuhan No. 1 Hospital, Wuhan, Hubei 430060, P.R. China