Animals Female Male Mice mouse 135 nonhuman 134 female 116 priority journal 114 article 113 male 111 controlled study 103 animal experiment 94 animal tissue 65 protein expression 54 animal model 52 animal 46 animal cell 44 Mice, Knockout 41 Humans 40 Mice, Inbred C57BL 38 human 34 metabolism 29 adult 28 Animalia 27 unclassified drug 27 Mus 24 genetics 24 Article 22 Mice, Inbred BALB C 22 Receptors, Dopamine D2 22