Modern day treatment of chronic bronchitis.
D000397:Air Pollution; D001991:Bronchitis / Q000628:therapy*; D002980:Climate; D006801:Humans; D006973:Hypertension / Q000009:adverse effects; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000150:complications; D012141:Respiratory Tract Infections / Q000150:complications; D012146:Rest; D012907:Smoking; D014140:Tracheotomy; D012122:Ventilators, Mechanical