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Figure 5: Frequency of HbH inclusion positive cells in 11 cases of alphathalassemia trait. Each dot represents the frequency in one smear area and horizontal lines represent the median frequency for the case. Different smear areas of each case contained HbH inclusion positive cells at comparable frequency, but the frequency varied between individuals with alphathalassemia trait (Kruskal–Wallis test with Dunn's multiple comparison, P < 0.0001). HbH: Hemoglobin H 
