RT Journal Article SR Electronic T1 Bronchial Biopsy in Chronic Bronchitis and Asthma JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 142 OP 153 DO 10.1136/thx.15.2.142 VO 15 IS 2 A1 A. A. Glynn A1 L. Michaels YR 1960 UL http://thorax.bmj.com/content/15/2/142.abstract AB