RT Journal Article SR Electronic T1 The burden of asthma: weighing the community risk against individual risk JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 471 OP 472 DO 10.1136/thx.54.6.471 VO 54 IS 6 A1 AHMAD VON SCHLEGELL A1 EVALYN N GRANT A1 KEVIN B WEISS YR 1999 UL http://thorax.bmj.com/content/54/6/471.abstract AB