Article 212 controlled study 171 human 150 nonhuman 140 Humans 117 chemistry 96 unclassified drug 95 concentration (composition) 90 pH 84 male 77 female 67 Hydrogen-Ion Concentration 63 concentration (parameter) 62 adult 55 metabolism 55 minimum inhibitory concentration 54 drug effect 53 in vitro study 48 Male 47 Female 45 article 42 Animals 38 procedures 38 Escherichia coli 35 plant extract 34 Adsorption 33 animal 33 animal experiment 33 isolation and purification 31 Staphylococcus aureus 29