Sympathochromaffin system activity in the elderly.
D000368:Aged; D000375:Aging / Q000502:physiology*; D002838:Chromaffin System / Q000502:physiology*; D004837:Epinephrine / Q000097:blood; D006801:Humans; D007700:Kinetics; D008657:Metabolic Clearance Rate; D009638:Norepinephrine / Q000097:blood; D013564:Sympathetic Nervous System / Q000502:physiology*
D009638:Norepinephrine; D004837:Epinephrine