1 Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, Osaka, Japan; Department of Advanced Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan.
2 Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, Osaka, Japan. Electronic address: look.tky@ncvc.go.jp.
3 Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, Osaka, Japan.