RT Journal Article SR Electronic T1 Effects of steroid therapy on inflammatory cell subtypes in asthma JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 374 OP 376 DO 10.1136/thx.2009.131391 VO 65 IS 5 A1 Boulet, Louis-Philippe YR 2010 UL http://thorax.bmj.com/content/65/5/374.abstract AB