Journal: Int. J. Environ. Res. Public Health, 2012
Article: Effects of Smoking and Genotype on the PSR Index of Periodontal Disease in Adults Aged 18–49
Polk, D.E.; Wang, X.; Feingold, E.; Shaffer, J.R.; Weeks, D.E.; Weyant, R.J.; Crout, R.J.; McNeil, D.W.; Marazita, M.L.
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