Animals animal human Humans 699 nonhuman 446 metabolism 379 controlled study 279 article 269 physiology 253 priority journal 236 genetics 224 mouse 220 Article 210 chemistry 197 Mice 196 unclassified drug 182 female 180 animal cell 168 Female 158 human cell 145 male 133 animal experiment 132 protein expression 127 Male 119 drug effects 114 drug effect 109 pathology 109 signal transduction 99 Review 98 Argentina 94