Dumur, V Abnormal distribution of cystic fibrosis delta F508 allele in adults with chronic bronchial hypersecretion. [electronic resource] - Lancet (London, England) Jun 1990 - 1340 p. digital Publication Type: Letter ISSN: 0140-6736 Standard No.: 10.1016/0140-6736(90)91216-w doi Subjects--Topical Terms: AdultAgedAllelesBronchial Diseases--geneticsChronic DiseaseCystic Fibrosis--geneticsHeterozygoteHumansMiddle AgedMutation