Comparison of agreement between the Neubauer chamber and three manual microscopy methods. The gray-shaded areas represent the number of cases within the same grade and the orange-shaded areas represent the number of cases within one grade difference and blue-shaded areas represent the number of cases within two grade difference.
Abbreviations: RBC, red blood cell; WBC, white blood cell; HPF, high power field; S & M labs, smaller or medium-sized laboratory; KAEQAS, Korean Association of External Quality Assessment Service; ≥1/2, ≥1/2 field of view.
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