Increased adhesion of human HS RBCs to TSP and LM. Washed RBCs from human controls (□,N1 through N4), a patient with nonspherocytic hemolytic anemia of unknown etiology (▤, HA), and patients with HS (▧, HS1 through HS8) were perfused through flow chambers coated with TSP (A) or LM (B), as described for Figure 1. Adherent RBCs/mm² are depicted as the mean of duplicate measurements from the same blood sample.