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Recreational drug use in the Oslo nightlife setting: study protocol for a cross-sectional time series using biological markers, self-reported and qualitative data
- Correspondence to Dr Anne Line Bretteville-Jensen; anne.line.bretteville-jensen{at}fhi.no
Citation
Recreational drug use in the Oslo nightlife setting: study protocol for a cross-sectional time series using biological markers, self-reported and qualitative data
Publication history
- Received July 6, 2015
- Revised November 19, 2015
- Accepted January 27, 2016
- First published April 22, 2016.
Online issue publication
April 22, 2016
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Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/ This is an Open Access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/