Affiliation: | 1.Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Japan; 2.Department of Cardiovascular Surgery, Chiba University Graduate School of Medicine, Japan; 3.Department of Cardiovascular Surgery, Toho University Sakura Medical Center, Japan; 4.Department of Surgical Pathology, Toho University Sakura Medical Center, Japan; 5.Department of Diagnostic Pathology, Chiba University Graduate School of Medicine, Japan |