title: Cycles, clocks, and power plants.
authors.affiliation: Department of Geriatrics and Adult Development, Mount Sinai Medical Center, New York, New York 10029.
authors.forename: R N
authors.initials: RN
authors.lastname: Butler
mesh_terms: D000375:Aging / Q000502:physiology*; D004503:Education, Medical, Graduate / Q000458:organization & administration*; D005853:Geriatrics / Q000193:education*; D006801:Humans; D008136:Longevity; D014481:United States