RT Journal Article SR Electronic T1 Cystic fibrosis JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 445 OP 446 DO 10.7861/clinmedicine.7-5-445 VO 7 IS 5 A1 Duncan Geddes YR 2007 UL http://www.rcpjournals.org/content/7/5/445.abstract AB