Assertion: morphine's use | /r/CapableOf | try to determine the source of morphine
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Source sentences:
text: Additionally, a patient’s CYP2D6 genotype or concomitant use of CYP2D6 enzyme inhibitors may impact codeine to morphine ratios in urine by impacting codeine metabolism, thereby limiting the utility of this ratio when trying to determine the source of morphine.