Xu, Bo Xu, Bo Xu, Dong, Xuanwu Hospital, Capital Medical University Xu, Hai-hua Xu, Hai-mei Xu, Jialiang Xu, Jianping Xu, Jiarui Xu, Jing-Jing Xu, Ke Xu, Qiang Xu, QuanFu, Department of Cardiology, Xinhua Hospital A ffiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China Xu, Rende Xu, Tongshun Xu, Wei, Tongji Hospital, Tongji University School of Medicine Xu, Xinye Xu, Yang Xu, Yu, Department of Cardiology, Zhengzhou University People’s Hospital (Henan Provincial People’s Hospital), Zhengzhou, Henan, China Xu, Yu (China) Xu, Yu-Fen Xu, Yuan-Ning, West China Hospital, Sichuan University Xu, Yuchen, Department of Echocardiography, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, Shanghai Institute of Medical Imaging, 180 Fenglin Road, Shanghai, China Xu-ping, Li Xue, Jian-fang Xue, Ning, Qingdao Municipal Health and Family Planning Science and Technology Education Center