[Chronic bronchitis and its treatment with silicic acid drugs].
D001991:Bronchitis; D029481:Bronchitis, Chronic; D006801:Humans; D012824:Silicic Acid; D012822:Silicon Dioxide; D014376:Tuberculosis; D014397:Tuberculosis, Pulmonary
D012824:Silicic Acid; D012822:Silicon Dioxide
BRONCHITIS; SILICA; TUBERCULOSIS, PULMONARY