Animals Article animal priority journal nonhuman 376 controlled study 310 metabolism 252 animal experiment 206 animal cell 172 mouse 170 male 162 animal tissue 160 female 152 physiology 146 Male 140 Mice 134 drug effects 132 Female 122 genetics 118 unclassified drug 112 human 96 Humans 90 animal model 86 adult 84 protein expression 78 signal transduction 68 in vitro study 66 chemistry 64 cytology 56 in vivo study 54