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Schafer J, Caetano R, Clark CL.Schafer J, et al. Among authors: clark cl.Am J Public Health. 1998 Nov;88(11):1702-4. doi: 10.2105/ajph.88.11.1702.Am J Public Health. 1998.PMID: 9807541Free PMC article.
Caetano R, Clark CL.Caetano R, et al. Among authors: clark cl.Drug Alcohol Depend. 1999 Mar 1;54(1):45-56. doi: 10.1016/s0376-8716(98)00148-3.Drug Alcohol Depend. 1999.PMID: 10101616
Caetano R, Clark CL, Greenfield TK.Caetano R, et al. Among authors: clark cl.Alcohol Health Res World. 1998;22(1):73-9.Alcohol Health Res World. 1998.PMID: 15706737Free PMC article.Review.