title: Preface.
authors.affiliation: a Department of Cardiovascular Medicine , Nephrology and Neurology University of the Ryukyus Graduate School of Medicine , Nishihara-cho , Japan.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Ohya
mesh_terms: D001794:Blood Pressure / Q000502:physiology*; D001795:Blood Pressure Determination / Q000379:methods*; D002940:Circadian Rhythm / Q000502:physiology*; D006801:Humans; D006973:Hypertension / Q000503:physiopathology*