RT Journal Article SR Electronic T1 Does influenza immunisation cause exacerbations of chronic airflow obstruction or asthma? JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 190 OP 194 DO 10.1136/thx.52.2.190 VO 52 IS 2 A1 J M Watson A1 J F Cordier A1 K G Nicholson YR 1997 UL http://thorax.bmj.com/content/52/2/190.abstract AB