Possible relationship between intergroup variability in circadian, circamensual and circannual rhythms in man.
Cohen
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D002940:Circadian Rhythm / Q000502:physiology; D005260:Female; D006128:Growth / Q000502:physiology; D006801:Humans; D008597:Menstrual Cycle / Q000502:physiology; D010507:Periodicity; D011247:Pregnancy; D012098:Reproduction / Q000502:physiology; D012621:Seasons