Central nervous system.
D000368:Aged; D000375:Aging; D001921:Brain / Q000473:pathology; D002490:Central Nervous System / Q000528:radiation effects*; D003704:Dementia / Q000453:epidemiology / Q000473:pathology; D006801:Humans; D007564:Japan; D008875:Middle Aged; D009689:Nuclear Warfare; D011832:Radiation Injuries / Q000473:pathology*