[National registration of cases of malignant neoplasms in children: results in 1970].
D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D000013:Congenital Abnormalities / Q000150:complications; D005260:Female; D006761:Hospitals; D006801:Humans; D007564:Japan; D009369:Neoplasms / Q000150:complications / Q000453:epidemiology* / Q000235:genetics; D009381:Neoplasms, Radiation-Induced / Q000453:epidemiology; D011247:Pregnancy; D012042:Registries; D012737:Sex Factors; D013997:Time Factors