Male Mice animal model nonhuman priority journal Animals 132 controlled study 127 mouse 127 animal experiment 125 male 120 article 116 animal tissue 90 animal cell 60 Female 41 female 36 protein expression 36 animal 33 Humans 30 Mice, Inbred BALB C 30 drug effect 29 unclassified drug 28 Mice, Inbred C57BL 26 metabolism 26 in vivo study 24 in vitro study 21 Article 20 genetics 20 human 20 Mice, Knockout 19 gene expression 19