1. Xuemei Peng:
Department of Cardiology, The First Hospital of Fangshan District, Beijing, Beijing 102400, P.R. China.
2. Jianhui Zhang:
Department of Cardiology, The First Hospital of Fangshan District, Beijing, Beijing 102400, P.R. China.
3. Lihong Wan:
Department of Cardiology, The First Hospital of Fangshan District, Beijing, Beijing 102400, P.R. China.
4. Hui Wang:
Department of Cardiology, The First Hospital of Fangshan District, Beijing, Beijing 102400, P.R. China.
5. Wuning Zhang:
Department of Cardiology, The First Hospital of Fangshan District, Beijing, Beijing 102400, P.R. China.