RT Journal Article SR Electronic T1 Increasing incidence of pulmonary embolism JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 1102 OP 1102 VO 63 IS 12 A1 J Mathew YR 2008 UL http://thorax.bmj.com/content/63/12/1102.abstract AB