title: Aging research: challenge of the twenty-first century.
mesh_terms: D000368:Aged; D000375:Aging; D000544:Alzheimer Disease; D002455:Cell Division; D002477:Cells / Q000166:cytology; D004260:DNA Repair; D006801:Humans; D008136:Longevity; D008875:Middle Aged; D009369:Neoplasms / Q000473:pathology; D012106:Research; D013269:Stochastic Processes; D014481:United States