Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) ALEXANDER GM,Pyrophosphate arthropathy : a study of metabolic associations and laboratory data,Ann Rheum Dis,,,1982,41,,377-381,https://cir.nii.ac.jp/crid/1570572701504365184,https://doi.org/10.1136/ard.41.4.377