Male controlled study male priority journal article 305 nonhuman 278 Animals 254 animal experiment 206 female 196 Female 192 animal tissue 150 Humans 139 human 138 adult 122 animal cell 108 mouse 100 Mice 94 animal 89 rat 89 Rats 83 animal model 82 Article 78 Adult 75 protein expression 73 metabolism 69 Middle Aged 61 physiology 56 unclassified drug 54 Rats, Sprague-Dawley 47 aged 45