animal model controlled study nonhuman 193 unclassified drug animal experiment 187 mouse 154 Animals 148 article 127 priority journal 124 Mice 117 animal cell 99 animal tissue 98 female 89 human 76 Female 74 protein expression 73 animal 72 male 72 Humans 66 Article 60 Male 58 metabolism 57 human cell 52 in vitro study 47 in vivo study 45 cell proliferation 40 rat 40 Mice, Inbred BALB C 34 Rats 34 drug effect 33