Hackshaw, A Lung Cancer and passive smoking. Increased risk is not disputed. [electronic resource] - BMJ (Clinical research ed.) Nov 2000 - 1221-2; author reply 1222-3 p. digital Publication Type: Comment; Letter ISSN: 0959-8138 Subjects--Topical Terms: HumansLung Neoplasms--etiologyPublication BiasRisk FactorsTobacco Smoke Pollution--adverse effects