1. Department of Internal Medicine II (J.M., M.J.B., S.P., T.S., M.T., S.S., L.S.M., S.W.), University Medical Center Regensburg, Germany.
2. Department of Cardiothoracic Surgery (Z.P.), University Medical Center Regensburg, Germany.
3. Davis Heart and Lung Research Institute, Ohio State University, Columbus (P.J.M., H.M., T.J.H.).