Prenatal X-ray exposure and childhood cancer in twins.
D000293:Adolescent; D002648:Child; D004200:Diseases in Twins; D005260:Female; D006801:Humans; D009381:Neoplasms, Radiation-Induced / Q000453:epidemiology*; D011247:Pregnancy; D011297:Prenatal Exposure Delayed Effects; D011859:Radiography / Q000009:adverse effects*