Rate of Fentanyl Positivity Among Urine Drug Test Results Positive for Cocaine or Methamphetamine

Robert K. Twillman, PhD joins JAMA Network editors to discuss a cross-sectional study analyzing the rates of fentanyl positivity in urine drug test results that were positive for cocaine or methamphetamine. Read the article here: https://ja.ma/2V0v5sI.

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