Animals Male animal tissue female nonhuman 162 Female 150 male 147 controlled study 128 priority journal 127 article 122 animal experiment 104 animal cell 61 Mice 59 mouse 59 animal 55 Article 40 Rats 38 protein expression 37 animal model 36 rat 36 Animalia 35 metabolism 33 adult 32 Cichlids 30 gene expression 29 Brain 28 cichlid 28 genetics 28 physiology 27 Rats, Sprague-Dawley 26