- Correspondence to Dr Michael Kreuter, Center for Interstitial and Rare Lung Diseases, Pneumology and Respiratory Critical Care Medicine, Thoraxklinik, Heidelberg University Hospital, Röntgenstrasse 1, Heidelberg 69120, Germany;
- Received April 22, 2016
- Revised July 27, 2016
- Accepted August 8, 2016
- First published October 5, 2016.
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