title: Letter: Passive immunity against childhood cancer.
mesh_terms: D004307:Dose-Response Relationship, Radiation; D006801:Humans; D007112:Immunity, Maternally-Acquired; D007223:Infant; D009447:Neuroblastoma / Q000276:immunology* / Q000401:mortality / Q000532:radiotherapy; D011879:Radiotherapy Dosage; D009396:Wilms Tumor / Q000276:immunology* / Q000401:mortality / Q000532:radiotherapy