Cite
HARVARD Citation
Silveira, M. et al. (2016). Secular trends in smoking during pregnancy according to income and ethnic group: four population-based perinatal surveys in a Brazilian city. BMJ open. 6 (2), p. . [Online].
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Silveira, M. et al. (2016). Secular trends in smoking during pregnancy according to income and ethnic group: four population-based perinatal surveys in a Brazilian city. BMJ open. 6 (2), p. . [Online].