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Figure. Partial regression plot of 1507 current smokers in the NHANES III study, depicting the linear association remaining between mean attachment loss and serum cotinine after adjustment for log of self-reported cigarettes smoked per day, age, age squared, race (white, other), and gender.

J DENT RES, Vol. 82, No. 5, 345-349 (2003)
DOI: 10.1177/154405910308200504

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