title: Circadian variation and dynamic coronary vasoconstriction.
authors.forename: J A
authors.initials: JA
authors.lastname: Panza
authors.forename: A A
authors.initials: AA
authors.lastname: Quyyumi
mesh_terms: D002940:Circadian Rhythm / Q000502:physiology*; D003327:Coronary Disease / Q000503:physiopathology; D003331:Coronary Vessels / Q000502:physiology* / Q000503:physiopathology; D006801:Humans; D014661:Vasoconstriction / Q000502:physiology*