5Palmer R M, Scott D A, Wilson R F. Tobacco Smoking With Periodontal Disease [ J ]. J Clin Periodontol,2001,28 (9) :895-901. T.
6erry P, Ekbom A, Lichtenstein P, et al. Long-term tobacco smoking and colorectal cancer in a prospective cohort study[ J]. Int J Cancer,2001, 91 (4) :585-587.
7Boffetta P, Kreuzer M, Benhamou S, et al. Risk of lung cancer from to bacco smoking among young women from Europe[ J]. Int J Cancer,2001, 91 (5) :745-746.
9Tyrpien K.C.,Dobosz,A.Chr□□ciewicz,M.et al.Investigation of nicotine transformation products by densitometric TLC and ACTA[J].Chromatographica.2003,13:154-160.
10Benowitz N.L.,B Herrera,Peyton Jacob Ⅲ.Mentholated cigarette smoking inhibits nicotine metabolism[J].The journal of pharmacology and experimental therapeutics,2004,310:1208-1215.