Neutrons.
D000818:Animals; D004285:Dogs; D004781:Environmental Exposure / Q000517:prevention & control*; D005260:Female; D000882:Haplorhini; D006801:Humans; D008297:Male; D051379:Mice; D009381:Neoplasms, Radiation-Induced / Q000209:etiology / Q000517:prevention & control*; D009502:Neutrons / Q000009:adverse effects* / Q000627:therapeutic use; D011817:Rabbits; D011829:Radiation Dosage; D051381:Rats; D018570:Risk Assessment; D012307:Risk Factors; D012680:Sensitivity and Specificity; D016019:Survival Analysis