Time Factors priority journal article 286 nonhuman 220 controlled study 214 Animals 184 Male 132 male 128 Humans 116 animal experiment 110 human 104 animal cell 82 female 80 Female 78 Mice 76 mouse 68 Rats 64 animal tissue 60 unclassified drug 58 rat 56 Dose-Response Relationship, Drug 46 time 46 Enzyme Inhibitors 42 adult 42 Adult 40 metabolism 40 animal 38 animal model 38 Memory 36 human cell 34