A 300 ng/mL cutoff is more sensitive and may detect lower concentrations of opiates, while a 2000 ng/mL cutoff aligns with federal workplace testing standards and is designed to reduce positives from dietary sources such as poppy seeds
CEASE - Massachusetts General Hospital, Boston, MA 2017 [Available from: Winickoff JP, Hipple B, Drehmer J, Nabi E, Hall N, Ossip DJ, et al
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