The effect of São Paulo's smoke-free legislation on carbon monoxide concentration in hospitality venues and their workers - Issa, Jaqueline S.; Abe, Tania M. O.; Pereira, Alexandre C.; Megid, Maria Cristina; Shimabukuro, Cristina E.; Valentin, Luís Sergio O.; Ferreira, Marizite M. da C.; Nobre, Moacyr R. C.; Lancarotte, Ines; Barretto, Antonio Carlos Pereira (Tobacco Control, 2011)