From the 1st Cardiology Department (S.B., E.O., A.S.A., I.K., D.T.) and Radiology Department (E.S., C.D.), Hippokration Hospital, Athens Medical School, Greece; Center for Experimental Surgery, Clinical, and Translational Research (N.P., A.G., M.M., G.S., C.D.A.), and Center of Systems Biology (P.K.), Biomedical Research Foundation, Academy of Athens, Greece; and Department of Informatics and Telecommunications, University of Athens, Greece (P.K.).