RT Journal Article SR Electronic T1 Pyoderma gangrenosum JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 345 OP 345 DO 10.1136/thorax.55.4.345d VO 55 IS 4 A1 G D PERKINS A1 H MOUDGIL A1 R JONES YR 2000 UL http://thorax.bmj.com/content/55/4/345.5.abstract AB