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Brcak, Michaela; Beck, Olof; Bosch, Tessa; Carmichael, Duncan; Fucci, Nadia; George, Claire; Piper, Mark; Salomone, Alberto; Schielen, Wim; Steinmeyer, Stefan; Taskinen, Sanna; Weinmann, Wolfgang (2018). European Guidelines for Workplace Drug Testing in Oral Fluid. Drug testing and analysis, 10(3), pp. 402-415. Wiley 10.1002/dta.2229
