title: Circadian variation in vascular tone.
authors.forename: S
authors.initials: S
authors.lastname: Kalsner
mesh_terms: D002940:Circadian Rhythm / Q000502:physiology*; D006801:Humans; D009599:Nitroprusside / Q000494:pharmacology; D010646:Phentolamine / Q000494:pharmacology; D014666:Vasomotor System / Q000187:drug effects / Q000502:physiology*
chemical_list: D009599:Nitroprusside; D010646:Phentolamine