Deshpande Mandar, Kamath Ajay, Allinson Kieren, Peat Danielle, Parry Wyn
Department of Respiratory Medicine, Norfolk & Norwich University Hospital, Colney Lane, Norwich NR4 7UY, UK.
Thorax. 2011 Aug;66(8):733, 738-9. doi: 10.1136/thoraxjnl-2011-200109. Epub 2011 Jun 18.