title: Circadian rhythms in old age.
authors.affiliation: Department of Physiology, University of Leiden, The Netherlands.
authors.forename: G A
authors.initials: GA
authors.lastname: Kerkhof
mesh_terms: D000368:Aged; D000375:Aging / Q000502:physiology*; D001921:Brain / Q000502:physiology*; D002940:Circadian Rhythm; D004569:Electroencephalography; D005260:Female; D006801:Humans; D008297:Male; D012890:Sleep / Q000502:physiology*; D013997:Time Factors; D014851:Wakefulness / Q000502:physiology; D014938:Work Capacity Evaluation