- Correspondence to Judith J Prochaska, University of California San Francisco, 401 Parnassus Avenue—TRC 0984, San Francisco, CA 94143-0984, USA;
- Received December 19, 2010
- Accepted June 9, 2011
- First published July 5, 2011.
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.