- Correspondence to Carmel Stock, Interstitial Lung Disease Unit, Royal Brompton Hospital and National Heart and Lung Institute, Imperial College London, Emmanuel Kaye Building, 1B Manresa Road, London SW3 6LR, UK;
- Received February 17, 2012
- Revised November 21, 2012
- Accepted December 20, 2012
- First published January 15, 2013.
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