human priority journal Humans 684 article 604 controlled study 525 human cell 377 nonhuman 371 female 309 Animals 288 Female 283 male 275 Male 244 adult 236 unclassified drug 215 protein expression 194 Adult 165 metabolism 164 Article 162 animal cell 145 signal transduction 135 Middle Aged 122 clinical article 120 mouse 117 Mice 115 animal 114 major clinical study 105 protein function 103 aged 102 cell proliferation 96 in vitro study 89