animal cell nonhuman 435 priority journal unclassified drug controlled study 368 article 345 Animals 335 mouse 194 Mice 170 protein expression 144 animal experiment 134 Humans 129 human 114 rat 108 female 103 animal 102 animal tissue 98 Rats 96 male 94 metabolism 92 human cell 82 Article 80 Female 80 Male 78 animal model 77 signal transduction 69 messenger RNA 67 antiviral activity 58 in vitro study 58 Animalia 56