animal experiment human nonhuman controlled study 240 Animals 226 Humans 204 mouse 204 animal model 178 priority journal 168 Mice 158 article 158 human cell 158 animal cell 144 animal 138 female 122 protein expression 120 Female 116 male 114 unclassified drug 110 metabolism 104 Article 102 animal tissue 102 Male 90 in vivo study 84 in vitro study 78 genetics 64 cell proliferation 62 pathology 62 Mice, Inbred BALB C 50 Cell Line, Tumor 48