Synthetic cannabis consumption does not cause a positive urine drug test for THC, its metabolites or other cannabinoids present in marijuana using standard immunological screening procedures, library search GC-MS-screening, or multi-target screening by LC-MS/MS.
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A prefix operator is an operator that is applied to the variable, constant, function, or parenthetic expression that immediately follows it. The plus sign (+) and minus sign (-) can be used as prefix operators. The word NOT and its equivalent symbols are also prefix operators. The following are examples of prefix operators used with variables, constants, functions, and parenthetic expressions: