animal experiment controlled study human nonhuman 234 Animals 202 Humans 190 mouse 184 animal model 162 priority journal 154 Mice 140 human cell 140 article 132 animal cell 128 animal 123 protein expression 112 female 109 male 102 Female 99 unclassified drug 98 metabolism 97 Article 96 animal tissue 96 Male 83 in vivo study 80 in vitro study 75 cell proliferation 59 genetics 58 pathology 55 Cell Line, Tumor 44 signal transduction 42