Animals 327 Humans animal human nonhuman 193 metabolism 165 controlled study 125 article 114 priority journal 108 physiology 107 Article 100 genetics 94 mouse 93 chemistry 91 Mice 82 unclassified drug 81 female 78 animal cell 76 Female 68 human cell 61 animal experiment 60 protein expression 58 male 57 drug effects 56 pathology 52 Male 51 drug effect 47 Review 46 signal transduction 43 Argentina 42