1. From the Department of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany (S.K., T.R., E.B., K.H., P.N., S.L., S.P., B.S., S.Z., M.K., G.S.), and Heart Center (T.R., K.H., S.P.) and Department of Cardiovascular Surgery (G.V.), Semmelweis University, Budapest, Hungary.