2World Health Organization. Trends in Substance Use and Associated Health Problems [M]. Geneva: World Health Organization, 1996. 127.
3Samet JM, Yoon SY. Women and the Tobacco Epidemic:Challenges for the 21st Century[M]. Geneva: World Health Organization, 2001.17-19.
4Cnattingius S. The epidemiology of smoking during pregnancy: Smoking prevalence, maternal characteristics, and pregnancy outcomes[J]. Nicotine Tob Res, 2004, 6(Suppl 2): 125-140.
5Chung HC, Kowalski CP, Kim HM,et al. Maternal cigarette smoking during pregnancy and the risk of having a child with cleft lip/palate[J]. Plast Reconstr Surg, 2000,105(2): 485-491.
6Beaty TH, Maestri NE, Hermanski JB, et al. Testing for gene-environment interaction among oral cleft cases born in Maryland in 1992-1996 [J]. Cleft Palate Craniofac J,1997, 34(5): 447-454.
7Christine L, sylvaine C, et al. Tobacco and alcohol use during pregnancy and risk pf oral clefts [J]. Am J Public Health, 2000, 90(3): 415-419.
8Werler MM, Lammer EJ, Rosenberg L,et al. Maternal cigarette smoking during pregnancy in relation to oral clefts[J]. Am J Epidemiol. 1999, 132 (5): 926-932.
9Kallen K. Maternal smoking and orofacial clefts[J]. Cleft Palate Craniofac J. 1997,34(1):11-16.
10Little J, Cardy A, Munger RG. Tobacco smoking and oral clefts: a meta-analysis[J]. Bull World Health Organ, 2004,82(3): 213-218.