Thorax,
Smoking duration alone provides stronger risk estimates of chronic obstructive pulmonary disease than pack-years. https://thorax.
Gresp Grupo Respiratórias,
Background Cigarette smoking is the strongest risk factor for COPD. Smoking burden is frequently measured in pack-years, but…
Thorax,
Original article: Smoking duration alone provides stronger risk estimates of COPD than pack-years smoked http://thorax.bmj.com/co…
Thorax,
Original article: Smoking duration alone provides stronger risk estimates of COPD than pack-years http://thorax.bmj.com/content/e…