Age-related sleep habits and retirement.
D000328:Adult; D000367:Age Factors; D000368:Aged; D004569:Electroencephalography; D005260:Female; D005387:Finland; D006801:Humans; D008297:Male; D008875:Middle Aged; D012179:Retirement; D012737:Sex Factors; D012890:Sleep / Q000502:physiology*; D012894:Sleep Stages / Q000502:physiology; D013997:Time Factors