title: Pyrophosphate arthropathy: a clinical study of fifty cases.
mesh_terms: D000328:Adult; D000368:Aged; D002805:Chondrocalcinosis / Q000175:diagnosis* / Q000000981:diagnostic imaging; D011756:Diphosphates; D005260:Female; D006801:Humans; D007717:Knee / Q000000981:diagnostic imaging; D007719:Knee Joint; D008297:Male; D008875:Middle Aged; D011859:Radiography
chemical_list: D011756:Diphosphates