1. From the Department of Internal Medicine II, Rheinische Friedrich-Wilhelms University, Bonn, Germany (Y.L., Q.L., M.R.H., A.Z., A.F., P.L., T.S., D.F., P.G., G.N., N.W., F.J.)
2. Department of Cardiology, Second Hospital of Jilin University, Changchun, China (Q.L.).