GSTM1 and Schnyder corneal dystrophy: Relationship between haematological parameters and sickle cell disease states: mean value of MCHC (35.1±3.4), pack cell volume (22.4±2.7), Hb (8.8±0.9), platelets (PLT) (386.4±31) and absolute neutrophil count (7.0±2.1) in SCD.