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Al-Bayaty, F.H. and Wahid, N.A.A. and Bulgiba, A.M. (2008) Tooth mortality in smokers and nonsmokers in a selected population in Sana'a, Yemen. Journal of Periodontal Research, 43 (1). pp. 9-13. ISSN 0022-3484, DOI https://doi.org/10.1111/j.1600-0765.2007.00988.x.