Humans controlled study human 1,296 article 1,109 priority journal 970 human cell 701 nonhuman 658 Animals 621 Female 593 female 573 Male 493 male 469 unclassified drug 441 adult 399 metabolism 382 protein expression 373 animal cell 357 Article 349 Adult 314 Mice 305 mouse 300 animal 260 animal experiment 249 Middle Aged 230 genetics 220 cell proliferation 214 signal transduction 211 Cell Line, Tumor 205 Cell Line 182 physiology 181