[On the stages of chronic bronchitis].
D001991:Bronchitis / Q000150:complications*; D002908:Chronic Disease; D004646:Emphysema / Q000209:etiology; D006352:Heart Ventricles; D006801:Humans; D006976:Hypertension, Pulmonary / Q000209:etiology; D011660:Pulmonary Heart Disease / Q000209:etiology
O stadiĭnosti khronicheskogo bronkhita.