RT Journal Article SR Electronic T1 An unusual case of refractory asthma JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 54 OP 54 DO 10.1136/thx.2010.139212 VO 66 IS 1 A1 Wai-Ting Nicola Lee A1 Aileen Brown A1 Steve Banham A1 Hamish Walker A1 Martin Johnson YR 2011 UL http://thorax.bmj.com/content/66/1/54.abstract AB