Article Information
vol. 21 no. 124 141-146
PubMed
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History
- Received February 3, 2012
- Accepted February 20, 2012
- Published online May 31, 2012.
Copyright & Usage
©ERS 2012
Author Information
- Roland M. du Bois⇓
- R.M. du Bois, Imperial College London, London, SW7 2AZ, UK. E-mail: ron{at}du-bois.co.uk