animal controlled study metabolism priority journal Animals 379 nonhuman 373 animal cell 226 Article 218 animal experiment 214 mouse 199 animal tissue 174 Mice 167 article 161 physiology 157 genetics 147 female 143 male 143 Male 125 protein expression 124 Female 121 unclassified drug 117 human 107 animal model 106 drug effect 104 Humans 103 drug effects 103 signal transduction 93 rat 82 cytology 77 in vitro study 71