title: Author's reply.
authors.affiliation: Division of Cardiology, St. Mary's Hospital, Kurume, Japan. Electronic address: tashiro@st-mary-med.or.jp.
authors.forename: Hideki
authors.initials: H
authors.lastname: Tashiro
authors.affiliation: Division of Cardiology, St. Mary's Hospital, Kurume, Japan.
authors.forename: Tomoki
authors.initials: T
authors.lastname: Shikada
keywords: Coronary artery calcification; Ischemic heart disease; Multidetector-row computed tomography