1. From the Department of Cardiology, The Affiliated Hospital of Qingdao University, Shandong Province, China (J.G.); Department of Internal Medicine I (J.G., G.E., P.N.) and Comprehensive Heart Failure Center (J.G., G.E., P.N.), University Hospital Würzburg, Germany; and Department of Cardiology and Angiology, Hannover Medical School, Germany (A.S.).