Chronic bronchitis amongst the mining population.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001991:Bronchitis / Q000453:epidemiology*; D002908:Chronic Disease; D003032:Coal Mining; D005260:Female; D006801:Humans; D007194:India; D008297:Male; D008875:Middle Aged; D009784:Occupational Diseases / Q000453:epidemiology*; D011660:Pulmonary Heart Disease / Q000453:epidemiology; D012737:Sex Factors