Animals Humans animal 191 chemistry human 191 metabolism 114 nonhuman 105 unclassified drug 84 article 83 controlled study 82 priority journal 65 Article 54 mouse 53 human cell 50 Mice 47 animal cell 45 drug effects 42 drug effect 41 genetics 41 physiology 35 cell line 31 Cell Line 28 structure activity relation 27 animal experiment 26 chemical structure 26 synthesis 26 Cercopithecus aethiops 25 cell culture 25 in vitro study 25 protein expression 25