Wu Clara H K, Gunasekara Keith, Hull James H, Bikov Andras, Morris Adrian J, Usmani Omar S
Imperial College London, South Kensington Campus, London, United Kingdom.
Airway Diseases, National Heart and Lung Institute, Imperial College London and the Cough Clinic, Royal Brompton & Harefield NHS Foundation Trust, London, United Kingdom.
Respir Care. 2015 Feb;60(2):e34-7. doi: 10.4187/respcare.03255. Epub 2014 Aug 26.