Lin CN, Strathmann FG. Elevated urine zinc concentration reduces the detection of methamphetamine, cocaine, THC and opiates in urine by EMIT. J Anal Toxicol. 2013;37(9):665-669.
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Lin CN, Strathmann FG. Elevated urine zinc concentration reduces the detection of methamphetamine, cocaine, THC and opiates in urine by EMIT. J Anal Toxicol. 2013;37(9):665-669.