Chronic bronchitis and decreased forced expiratory flow rates in lifetime nonsmoking grain workers.
D000382:Agricultural Workers' Diseases / Q000503:physiopathology*; D001991:Bronchitis / Q000503:physiopathology*; D002908:Chronic Disease; D002523:Edible Grain; D005540:Forced Expiratory Flow Rates; D006801:Humans