Previous GWASs have identified several associations between a few genetic markers and different SCD phenotypes, such as rs3115229, linked to vaso-occlusive pain episodes, and markers (e.g., rs766432 and rs1427407) near BCL11A and rs9494145 in HBS1L-MYB, correlated with variable fetal hemoglobin (HbF) expression [14,28]. Here, BCL11A is linked to Schnyder corneal dystrophy.