article comparative study Animals 208 animal 190 nonhuman 120 metabolism 116 controlled study 110 physiology 110 priority journal 104 Male 92 human 92 male 92 female 90 Humans 86 Female 82 drug effect 76 Argentina 72 growth, development and aging 68 genetics 64 Comparative Study 54 Species Specificity 54 chemistry 54 isolation and purification 52 methodology 52 species difference 52 Mice 44 mouse 44 Support, Non-U.S. Gov't 40 Time Factors 40 enzymology 40