- Correspondence to Dr Janne Scheffels, Norwegian Institute for Alcohol and Drug Research (SIRUS), PO Box 565, Sentrum, 0105 Oslo, Norway;
- Received November 25, 2011
- Accepted May 12, 2012
- First published June 7, 2012.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.