RT Journal Article SR Electronic T1 Antagonism of tumour necrosis factor α in refractory asthma JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 571 OP 572 DO 10.1136/thx.2007.095042 VO 63 IS 7 A1 Berry, Mike A A1 Pavord, Ian D YR 2008 UL http://thorax.bmj.com/content/63/7/571.1.abstract AB