Animal mouse Mice 174 Support, Non-U.S. Gov't 156 nonhuman 148 article 130 priority journal 90 animal experiment 86 animal cell 76 Mice, Inbred BALB C 66 Male 54 controlled study 42 Liver 40 animal 36 animal model 34 liver 34 Animalia 30 Kinetics 28 In Vitro 26 animal tissue 26 intraperitoneal drug administration 26 Female 24 Mammary Neoplasms, Experimental 24 cell culture 24 Heme 22 in vitro study 22 male 22 5 aminolevulinate synthase 20 5-Aminolevulinate Synthetase 20 Cell Division 20