1 Department of Cardiovascular Surgery, Shizuoka Medical Center, Shizuoka, Japan; Department of Cardiovascular Surgery, Kitasato University School of Medicine, Sagamihara, Japan. Electronic address: kfgth973@ybb.ne.jp.
2 Department of Cardiovascular Surgery, Shizuoka Medical Center, Shizuoka, Japan; Department of Cardiovascular Surgery, Kitasato University School of Medicine, Sagamihara, Japan.
3 Department of Cardiovascular Surgery, Shizuoka Medical Center, Shizuoka, Japan.