Ricketts William M, O'Shaughnessy Terence C, van Ingen Jakko
Dept of Respiratory Medicine, Whittington Healthcare NHS Trust, London, UK
Dept of Respiratory Medicine, Barts Health NHS Trust, London, UK.
Eur Respir J. 2014 Oct;44(4):1085-7. doi: 10.1183/09031936.00066614. Epub 2014 Jun 25.