慢性阻塞性支气管炎

chronic myelomonocytic leukemia

chronic obstructive pulmonary disease

chronic exposure: >6gm/day - fluorosis, bone/joint damage…

chronic obstructive pulmonary diseases

chronic granulomatous disease

otitis media,catarrhal,chronic

chronic biological false-positive (seroreactions for syphilis)

juvenile chronic polyarthritis