Biological aging, physiological cycle, and carcinogenesis.
D000368:Aged; D000375:Aging; D002940:Circadian Rhythm; D004777:Environment; D006410:Hematopoiesis; D006801:Humans; D008875:Middle Aged; D009369:Neoplasms / Q000209:etiology*; D013312:Stress, Physiological / Q000150:complications