Animals human Humans 1,194 nonhuman 908 animal 778 article 700 priority journal 634 controlled study 578 Mice 414 human cell 414 metabolism 396 unclassified drug 396 mouse 382 animal cell 362 protein expression 306 Female 288 physiology 264 female 262 genetics 232 animal experiment 228 Male 224 Article 214 chemistry 206 male 202 signal transduction 192 protein function 188 animal model 164 review 152 cell proliferation 148 Cell Line 136