Animals animal model male nonhuman 288 animal experiment 277 controlled study 273 Male 248 article 226 priority journal 210 Mice 201 mouse 198 animal tissue 169 animal cell 124 animal 87 female 86 protein expression 84 Female 69 rat 67 Rats 63 Article 62 metabolism 62 Humans 59 in vivo study 58 human 57 unclassified drug 50 in vitro study 49 drug effect 46 Mus 41 Disease Models, Animal 38 Mice, Inbred BALB C 38