RT Journal Article SR Electronic T1 Narcolepsy risk after A/H1N1 2009 influenza vaccination JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 389 OP 389 DO 10.1136/thoraxjnl-2013-204079 VO 69 IS 4 A1 Drysdale, Simon B YR 2014 UL http://thorax.bmj.com/content/69/4/389.abstract AB