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An age–period–cohort analysis of cannabis use prevalence and frequency in Germany, 1990–2009
- Correspondence to Dr Daniela Piontek, IFT Institut für Therapieforschung, Parzivalstraße 25, München D-80804, Germany; piontek{at}ift.de
Citation
An age–period–cohort analysis of cannabis use prevalence and frequency in Germany, 1990–2009
Publication history
- Accepted July 1, 2011
- First published October 20, 2011.
Online issue publication
September 03, 2012
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© 2012, Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.