title: Proliferation of liver epithelia in three-week-old rats.
mesh_terms: D000818:Animals; D001345:Autoradiography; D002455:Cell Division; D008099:Liver / Q000254:growth & development*; D008938:Mitosis; D051381:Rats; D013936:Thymidine / Q000378:metabolism; D013997:Time Factors; D014316:Tritium
chemical_list: D014316:Tritium; D013936:Thymidine