Animals 39 animal 37 mouse 23 nonhuman 22 animal experiment 21 Mice 19 male 19 controlled study 18 Article 16 animal model 16 human 16 Male 15 Humans 13 female 13 animal tissue 12 metabolism 12 rat 11 article 10 Female 9 animal cell 9 chemistry 9 pathology 9 Rats 8 unclassified drug 8 in vivo study 7 physiology 7 in vitro study 6 C57BL mouse 5 Mice, Inbred C57BL 5 cell proliferation 5