Master's two-step tolerance test; application to a series of 104 normal old people.
D000368:Aged / Q000502:physiology; D000375:Aging; D004361:Drug Tolerance; D004562:Electrocardiography; D005080:Exercise Test; D006321:Heart / Q000502:physiology*; D006801:Humans
AGED/physiology; ELECTROCARDIOGRAPHY; HEART/physiology