Humans human 175 metabolism nonhuman priority journal Animals 136 animal 136 controlled study 111 animal cell 86 article 71 genetics 68 mouse 68 unclassified drug 63 Article 60 animal experiment 59 Mice 58 protein expression 58 physiology 55 chemistry 54 signal transduction 46 human cell 45 pathology 42 animal model 39 protein function 39 female 38 Review 34 rat 34 cytology 33 Female 32 in vitro study 32