RT Journal Article SR Electronic T1 Severe bullous emphysema associated with cocaine smoking JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 982 OP 983 DO 10.1136/thorax.56.12.982 VO 56 IS 12 A1 VAN DER KLOOSTER, J M A1 GROOTENDORST, A F YR 2001 UL http://thorax.bmj.com/content/56/12/982.abstract AB