- Correspondence to: Lawrence C An MD, University of Minnesota, Mayo Building, Mail Code 741, 420 Delaware Street SE, Minneapolis, MN 55455, USA;
- Received September 27, 2005
- Accepted April 20, 2006
- First published August 2, 2006.
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.