Humans controlled study male nonhuman Animals 126 Male 120 human 118 priority journal 97 animal experiment 96 article 91 female 78 animal cell 75 mouse 71 Mice 69 animal 68 Female 63 human cell 63 animal model 59 protein expression 59 Article 54 adult 53 animal tissue 49 metabolism 40 genetics 38 in vivo study 38 in vitro study 36 unclassified drug 34 pathology 32 Cell Line, Tumor 29 Signal Transduction 28