Jun Ren1, Yingmei Zhang2. 1. Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, 210032, PR China; Center for Cardiovascular Research and Alternative Medicine, University of Wyoming, Laramie, WY 82071, USA. Electronic address: jren@uwyo.edu. 2. Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, 210032, PR China; Center for Cardiovascular Research and Alternative Medicine, University of Wyoming, Laramie, WY 82071, USA. Electronic address: zhangym197951@126.com.