title: [A closed colony of laboratory rats].
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Aoyama
mesh_terms: D000822:Animal Husbandry; D000818:Animals; D000830:Animals, Laboratory; D021461:Animals, Outbred Strains / Q000235:genetics; D015197:Carcinogenicity Tests; D004195:Disease Models, Animal; D051381:Rats; D012099:Reproductive Techniques