Animals animal 222 metabolism 134 nonhuman 134 Article 129 mouse 126 controlled study 118 human 114 Mice 109 Humans 105 animal experiment 99 genetics 88 male 81 animal model 73 unclassified drug 61 animal tissue 60 rat 58 Male 55 drug effect 54 female 54 animal cell 53 Rats 49 chemistry 49 pathology 42 Female 39 gene expression 39 protein expression 36 in vivo study 33 Mice, Inbred C57BL 32 human cell 31