title: Hydroxyproline excretion in complicated pneumoconiosis.
mesh_terms: D000328:Adult; D000368:Aged; D003032:Coal Mining; D003094:Collagen / Q000378:metabolism*; D006801:Humans; D006909:Hydroxyproline / Q000652:urine*; D008297:Male; D008875:Middle Aged; D011009:Pneumoconiosis / Q000652:urine*
chemical_list: D003094:Collagen; D006909:Hydroxyproline