External quality assessment of analysis of urinary calculi--a new scheme based mainly on natural concrement materials.
Rebentisch
G
G
Carl-Thiem-Clinicum Cottbus, Institute of Clinical Chemistry and Laboratory Diagnostics, Germany.
Muche
J
J
Reinauer
H
H
D002624:Chemistry, Clinical / Q000592:standards*; D006801:Humans; D011786:Quality Control; D013055:Spectrophotometry, Infrared; D014545:Urinary Calculi / Q000737:chemistry*; D014961:X-Ray Diffraction