priority journal human 2,090 Humans 1,820 article 1,696 controlled study 1,350 nonhuman 1,172 Animals 934 human cell 844 female 696 Female 660 unclassified drug 606 male 604 Male 550 protein expression 512 adult 486 animal cell 466 Mice 380 metabolism 378 mouse 360 signal transduction 358 Article 352 Adult 342 protein function 272 animal 256 animal experiment 254 Middle Aged 252 cell proliferation 244 clinical article 244 aged 212 major clinical study 210