nonhuman priority journal Article 150 controlled study 133 animal experiment 93 Animals 92 animal 81 human 77 male 65 unclassified drug 64 animal model 62 animal tissue 53 mouse 52 female 51 rat 49 Humans 46 animal cell 37 metabolism 37 Male 35 Female 33 Mice 33 article 33 genetics 32 in vitro study 27 protein expression 27 Rats 25 drug effect 22 procedures 22 in vivo study 20 plant extract 20