metabolism priority journal controlled study 616 nonhuman 498 Animals 398 animal 396 Article 334 article 280 genetics 260 animal cell 246 human 238 animal experiment 232 Humans 228 physiology 226 unclassified drug 222 mouse 216 female 206 protein expression 196 animal tissue 186 Mice 180 Female 170 male 166 Male 144 signal transduction 144 drug effect 140 human cell 136 chemistry 130 drug effects 130 animal model 112 in vitro study 108