HMOX1 and hereditary elliptocytosis: A simple effect analysis revealed that Slc20a2-HO mice swam less than the other two genotypes only in the day 01 trials (for example, day 01: WT vs. Slc20a2-HE: p = 0.980, Slc20a2-HE vs. Slc20a2-HO: p < 0.0001, WT vs. Slc20a2-HO: p < 0.0001; Figure 3B).