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Article Source: Impact of the Spanish Smoking Law on Exposure to Second-Hand Smoke and Respiratory Health in Hospitality Workers: A Cohort Study
Fernández E, Fu M, Pascual JA, López MJ, Pérez-Ríos M, et al. (2009) Impact of the Spanish Smoking Law on Exposure to Second-Hand Smoke and Respiratory Health in Hospitality Workers: A Cohort Study. PLOS ONE 4(1): e4244. https://doi.org/10.1371/journal.pone.0004244

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