Fig. 1. Images of urine sediments for external quality assessment. (A) CUI-21-01 waxy cast (original magnification: ×200). (B) CUI-21-02 bilirubin crystals (original magnification: ×400). (C) CUI-21-03 ammonium magnesium phosphate crystal (original magnification: ×200). (D) CUI-21-04 leukocytes (original magnification: ×400).

Lab Med Qual Assur 2023;45:1~9 https://doi.org/10.15263/jlmqa.2023.45.1.1

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