[Comments on the research of chronic obstructive pulmonary disease].
Liu
Y
Y
D000397:Air Pollution / Q000009:adverse effects; D006801:Humans; D006976:Hypertension, Pulmonary / Q000150:complications*; D029424:Pulmonary Disease, Chronic Obstructive / Q000150:complications / Q000235:genetics / Q000517:prevention & control*; D011660:Pulmonary Heart Disease / Q000150:complications*; D012907:Smoking / Q000009:adverse effects / Q000453:epidemiology