oral fluid drug testing

Recreational drug use in the Oslo nightlife setting: study protocol for a cross-sectional time series using biological markers, self-reported and qualitative data
Trond Nordfjærn, Marit Edland-Gryt, Anne Line Bretteville-Jensen, Kristin Buvik, Johanna Gripenberg

BMJ Open Apr 2016, 6 (4) e009306; DOI: 10.1136/bmjopen-2015-009306

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oral fluid drug testing