Animals animal cell human nonhuman 341 Humans 308 controlled study 294 article 242 priority journal 237 human cell 236 Mice 205 mouse 202 animal 168 unclassified drug 162 protein expression 143 metabolism 140 animal experiment 120 female 103 animal model 96 Article 88 Female 86 Cell Line 79 signal transduction 77 genetics 72 cell proliferation 70 male 69 in vitro study 68 animal tissue 65 Cercopithecus aethiops 61 Rats 61 Cell Line, Tumor 60