1. Heart Center, Zhengzhou Ninth People’s Hospital, Zhengzhou, China
2. Department of Cardiology, Helmut-G.-Walther-Klinikum, Lichtenfels, Germany
3. Cardiovascular Division, Department of Medicine, University of Minnesota Medical School, Minneapolis, MN, USA
4. Department of Surgery, Zhengzhou Ninth People’s Hospital, Zhengzhou, China
5. Clinic for General Internal Medicine and Cardiology, Catholic Medical Center Koblenz-Montabaur, Germany