Exon 5 Polymorphisms in the O 6-Alkylguanine DNA Alkyltransferase Gene and Lung Cancer Risk in Non–Smokers Exposed to Second-Hand Smoke - Cohet, Catherine; Borel, Stephane; Nyberg, Fredrik; Mukeria, Anush; Brüske-Hohlfeld, Irene; Constantinescu, Vali; Benhamou, Simone; Brennan, Paul; Hall, Janet; Boffetta, Paolo (Cancer epidemiology, biomarkers & prevention, 2004)