Passive smoking exposure and risk of COPD in China.
Chen
Ruoling
R
D002681:China / Q000453:epidemiology; D015986:Confounding Factors, Epidemiologic; D006801:Humans; D029424:Pulmonary Disease, Chronic Obstructive / Q000453:epidemiology / Q000209:etiology* / Q000401:mortality; D012307:Risk Factors; D014028:Tobacco Smoke Pollution / Q000009:adverse effects*
D014028:Tobacco Smoke Pollution