RT Journal Article SR Electronic T1 Asthma and natural killer T cells JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 544 OP 544 DO 10.1136/thx.2006.la0204 VO 61 IS 6 A1 H E Davies YR 2006 UL http://thorax.bmj.com/content/61/6/544.abstract AB