title: Author's reply.
authors.affiliation: Department of Cardiology, Ehime Prefectural Central Hospital, Ehime, Japan.
authors.forename: Masaki
authors.initials: M
authors.lastname: Kinoshita
authors.affiliation: Department of Cardiology, Ehime Prefectural Central Hospital, Ehime, Japan. Electronic address: c-hokayama@eph.pref.ehime.jp.
authors.forename: Hideki
authors.initials: H
authors.lastname: Okayama