title: Diurnal Heart Rate Variability Fluctuations in Normal Volunteers.
authors.affiliation: Division of Endocrinology and Metabolism, Department of Internal Medicine, The Catholic University of Korea, Seoul, Korea.
authors.forename: Hun-Sung
authors.initials: HS
authors.lastname: Kim
authors.affiliation: Division of Endocrinology and Metabolism, Department of Internal Medicine, The Catholic University of Korea, Seoul, Korea.
authors.forename: Kun-Ho
authors.initials: KH
authors.lastname: Yoon
authors.affiliation: Division of Endocrinology and Metabolism, Department of Internal Medicine, The Catholic University of Korea, Seoul, Korea drhopper@catholic.ac.kr.
authors.forename: Jae-Hyoung
authors.initials: JH
authors.lastname: Cho
keywords: cardiac autonomic function; diurnal fluctuation; heart rate variability (HRV)