Animals controlled study human priority journal nonhuman 296 Humans 288 article 249 human cell 214 animal cell 210 Mice 185 mouse 176 protein expression 139 animal 137 unclassified drug 135 animal experiment 134 metabolism 107 animal model 97 Female 94 female 91 Article 80 animal tissue 77 in vitro study 74 male 72 signal transduction 69 Male 67 genetics 66 cell proliferation 62 in vivo study 62 Rats 55 protein function 54