Fig. 1. Images of urine sediments for external quality assessment. (A) CUI-22-01 bilirubin crystals (original magnification: ×400). (B) CUI-22-02 renal tubular epithelial cells (original magnification: ×400). (C) CUI-22-03 waxy cast (original magnification: ×200). (D) CUI-22-04 ammonium magnesium phosphate crystal (original magnification: ×400).

Lab Med Qual Assur 2023;45:125~134 https://doi.org/10.15263/jlmqa.2023.45.4.125

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