- Correspondence to Marc Decramer, Respiratory Division, University Hospital, Herestraat 49, 3000 Leuven, Belgium;
- Received December 16, 2009
- Accepted May 11, 2010
- First published August 30, 2010.
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.