Animals animal controlled study human Humans 260 nonhuman 244 metabolism 199 Article 152 animal cell 148 mouse 147 priority journal 137 Mice 129 unclassified drug 126 human cell 125 animal experiment 123 article 117 genetics 116 female 105 protein expression 89 Female 87 animal model 84 chemistry 84 physiology 84 male 78 pathology 71 drug effects 70 Male 64 in vitro study 63 in vivo study 62 animal tissue 57