centrifugation Article 17 nonhuman 13 human 11 controlled study 10 Humans 8 animal cell 5 metabolism 5 Animals 3 Centrifugation 3 adult 3 animal 3 animal experiment 3 binding affinity 3 cell culture 3 female 3 genetics 3 limit of detection 3 liquid chromatography-mass spectrometry 3 sensitivity and specificity 3 unclassified drug 3 Binding Sites 2 Rats 2 Western blotting 2 acetonitrile 2 ampicillin 2 animal model 2 antibiotic sensitivity 2 aqueous solution 2 article 2