priority journal nonhuman 200 article 198 controlled study 126 Animals 92 animal cell 61 unclassified drug 60 human 51 isolation and purification 51 drug isolation 49 Article 46 cell isolation 46 animal tissue 44 Argentina 40 female 40 animal 39 Humans 36 Trypanosoma cruzi 36 male 36 metabolism 35 Molecular Sequence Data 34 animal experiment 33 nucleotide sequence 33 Female 32 in vitro study 31 Male 28 human cell 27 rat 27 genetics 25 Support, Non-U.S. Gov't 24