PROS1 and Schnyder corneal dystrophy: Phagocytosis of circulating eryghosts from patients with SCD was 3.5 ± 2.2‐fold higher in the presence of PROS1 (n = 17), whereas PROS1 did not increase the phagocytosis of intact RBC from patients with SCD (1.2 ± 0.3 + PROS1/‐PROS1 ratio, n = 8, Figure 5B) nor Control‐RBC (1.0 ± 0.1 + PROS1/‐PROS1 ratio, n = 14), consistent with the absence of PtdSer‐exposure.