Cell morphology pictures posted for the proficiency tests of blood cell morphology. (A) HHI-18-01 segmented neutrophil (arrow). (B) HHI-18-02 platelet aggregates (arrows). (C) HHI-18-03 monocyte (arrows). (D) HHI-18-04 Malaria infected RBC (arrows). Abbreviation: RBC, red blood cell.