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Sanna, Taskinen; Olof, Beck; Tessa, Bosch; Michaela, Brcak; Duncan, Carmichael; Nadia, Fucci; Claire, George; Mark, Piper; Alberto, Salomone; Wim, Schielen; Stefan, Steinmeyer; Weinmann, Wolfgang (2017). European Guidelines for Workplace Drug Testing in Urine. Drug testing and analysis, 9(6), pp. 853-865. Wiley 10.1002/dta.2178