Humans nonhuman unclassified drug Animals 388 human 386 controlled study 296 priority journal 294 article 292 animal cell 202 human cell 186 Mice 158 animal 158 mouse 148 protein expression 146 metabolism 142 chemistry 96 animal experiment 94 protein function 90 Article 84 Cell Line 80 Female 76 in vitro study 76 animal model 70 signal transduction 68 female 64 review 64 drug effects 62 Male 60 Protein Binding 60 genetics 60