animal model article controlled study nonhuman 183 protein expression animal experiment 174 Animals 158 priority journal 156 mouse 137 Mice 121 animal tissue 113 animal cell 108 female 97 Female 80 male 75 Humans 67 Male 63 human 53 rat 51 cell proliferation 49 Mice, Inbred BALB C 43 Rats 42 in vivo study 42 protein function 41 unclassified drug 41 apoptosis 38 human cell 36 immunohistochemistry 34 Mice, Inbred C57BL 32 in vitro study 31