article nonhuman 284 Animals 241 controlled study 235 priority journal 220 Humans 114 metabolism 114 unclassified drug 111 animal 107 human 104 animal cell 103 Mice 90 male 89 mouse 86 genetics 82 physiology 79 Male 76 protein expression 73 female 69 animal experiment 68 Female 67 human cell 61 signal transduction 57 animal tissue 53 chemistry 51 Molecular Sequence Data 48 Argentina 46 Animalia 44 nucleotide sequence 42 protein function 42