Animals 133 Humans animal controlled study human 133 priority journal nonhuman 125 metabolism 103 animal cell 91 mouse 83 Article 76 Mice 71 animal experiment 69 genetics 62 human cell 56 unclassified drug 54 article 51 protein expression 50 animal model 47 female 45 physiology 43 chemistry 39 Female 37 animal tissue 36 in vitro study 36 pathology 36 in vivo study 34 signal transduction 33 male 32 drug effect 30