Obstetric ultrasound and childhood malignancies.
D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D004739:England; D005260:Female; D006801:Humans; D007223:Infant; D007938:Leukemia / Q000453:epidemiology / Q000209:etiology / Q000401:mortality; D009369:Neoplasms / Q000453:epidemiology / Q000209:etiology* / Q000401:mortality; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis*; D014463:Ultrasonography / Q000009:adverse effects*