Animal mouse Mice 173 Support, Non-U.S. Gov't 155 nonhuman 147 article 129 priority journal 90 animal experiment 86 animal cell 75 Mice, Inbred BALB C 65 Male 53 controlled study 42 Liver 39 animal 36 animal model 34 liver 33 Animalia 29 Kinetics 28 In Vitro 26 animal tissue 26 intraperitoneal drug administration 26 Female 24 cell culture 24 Mammary Neoplasms, Experimental 23 in vitro study 22 male 22 Heme 21 Cell Division 20 5 aminolevulinate synthase 19 5-Aminolevulinate Synthetase 19