The trends of the CVs of CBC parameters from 2016 to 2018. (A) WBC. (B) RBC. (C) Hgb. (D) Hct. (E) Platelet count. Abbreviations: L, low level; M, middle level; H, high level; CV, coefficient of variation; CBC, complete blood cell count; WBC, white blood cell count; RBC, red blood cell count; Hgb, hemoglobin; Hct, hematocrit.