1 Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan, West 7, North 15, Kita-ku, 060-8638 Sapporo, Japan.
2 Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan, West 7, North 15, Kita-ku, 060-8638 Sapporo, Japan. [email protected].
3 Department of Surgical Pathology, Hokkaido University Hospital, Japan.