1 Clinical Laboratory, National Cerebral and Cardiovascular Center, Osaka, Japan.
2 Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, 6-1 Kishibeshinmachi, Suita, Osaka, 564-8565, Japan. amaki@ncvc.go.jp.
3 Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, 6-1 Kishibeshinmachi, Suita, Osaka, 564-8565, Japan.