RT Journal Article SR Electronic T1 Fourth annual North American and 1990 International Cystic Fibrosis Conference. JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 72 OP 73 DO 10.1136/thx.46.1.72 VO 46 IS 1 A1 J. S. Elborn YR 1991 UL http://thorax.bmj.com/content/46/1/72.abstract AB