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APA Citation
Avila-Tang, E., Elf, J. L., Cummings, K. M., Fong, G. T., Hovell, M. F., Klein, J. D., McMillen, R., Winickoff, J. P., & Samet, J. M. (2013). assessing secondhand smoke exposure with reported measures. Tobacco control, 22(3), 156–163. http://access.bl.uk/ark:/81055/vdc_100135567828.0x00002a