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Kehl, Doris, Jochen R. Thyrian, Jan Lüdemann, Matthias Nauck, and Ulrich John. A Descriptive Analysis of Relations between Parents' Self-reported Smoking Behavior and Infants' Daily Exposure to Environmental Tobacco Smoke. BioMed Central, 2010.

Kehl, Doris, et al. A Descriptive Analysis of Relations between Parents' Self-reported Smoking Behavior and Infants' Daily Exposure to Environmental Tobacco Smoke. BioMed Central, 2010.