- Correspondence to Dr Adalberto Pacheco, Chronic Cough Unit, Pneumology Service, Hospital Ramón y Cajal, Crtra. Colmenar Km 9, Madrid 28234, Spain;
- Received May 6, 2014
- Revised May 26, 2014
- Accepted May 31, 2014
- First published June 26, 2014.
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