Life span of specified-pathogen-free (MRC category 4) mice and rats.
D000704:Analysis of Variance; D000818:Animals; D000830:Animals, Laboratory; D001424:Bacterial Infections / Q000473:pathology / Q000662:veterinary; D005260:Female; D005856:Germ-Free Life; D006799:Housing, Animal; D008136:Longevity; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D009369:Neoplasms / Q000473:pathology / Q000662:veterinary; D051381:Rats; D011919:Rats, Inbred Strains; D012376:Rodent Diseases / Q000473:pathology; D012737:Sex Factors