In vivo versus in vitro cellular aging.
D000328:Adult; D000368:Aged; D002455:Cell Division; D002460:Cell Line; D002470:Cell Survival; D002478:Cells, Cultured / Q000502:physiology*; D005347:Fibroblasts / Q000502:physiology; D006801:Humans; D008297:Male; D012867:Skin / Q000166:cytology