Cover photo courtesy of S. Liu et al, "Alteration of the Erythrocyte Membrane Skeletal Ultrastructure in Hereditary Spherocytosis, Hereditary Elliptocytosis, and Pyropoikilocytosis," July 1, 1990 BLOOD. See also "Structural and Functional Heterogeneity of Spectrin Mutations Involving the Spectrin Heterodimer Self-Association Site: Relationships to Hematologic Expression of Homozygous Hereditary Elliptocytosis and Hereditary Pyropoikilocytosis" by T. Coetzer et al, p 2235.