title: Use of logrank scores in the analysis of litter-matched data on time to tumor appearance.
mesh_terms: D000818:Animals; D005260:Female; D008297:Male; D008722:Methods; D009374:Neoplasms, Experimental / Q000209:etiology; D051381:Rats; D012107:Research Design; D013223:Statistics as Topic; D013997:Time Factors