Crawford Emma, Allen Martin, Mustfa Naveed, Stone Helen
Dept of Respiratory Medicine, Royal Stoke University Hospital, University Hospitals of North Midlands, Staffordshire, UK
Dept of Respiratory Medicine, Royal Stoke University Hospital, University Hospitals of North Midlands, Staffordshire, UK.
Eur Respir J. 2015 Sep;46(3):875-6. doi: 10.1183/09031936.00031615.