Perception of airway resistance in relation to breathlessness on exertion in chronic lung disease.
D000403:Airway Resistance; D001991:Bronchitis / Q000503:physiopathology; D002908:Chronic Disease; D003032:Coal Mining; D004417:Dyspnea; D006801:Humans; D008171:Lung Diseases / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D005082:Physical Exertion; D012119:Respiration; D012829:Silicosis / Q000503:physiopathology