RT Journal Article SR Electronic T1 Respiratory syncytial virus and asthma: still no final answer JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 1033 OP 1034 DO 10.1136/thx.2009.133967 VO 65 IS 12 A1 Renato T Stein A1 Fernando D Martinez YR 2010 UL http://thorax.bmj.com/content/65/12/1033.abstract AB