Animals 106 Humans animal animal cell human 106 mouse nonhuman 106 controlled study 98 Mice 96 metabolism 90 priority journal 76 animal experiment 56 Article 54 human cell 54 unclassified drug 52 animal model 50 genetics 50 protein expression 50 article 46 female 46 Female 38 in vitro study 36 pathology 34 physiology 32 signal transduction 30 animal tissue 28 cytology 28 drug effects 28 in vivo study 28 Cell Line, Tumor 26