APOA1 and sickle cell disease: Arylesterase activity in the sickle cell disease group was positively correlated with total cholesterol (r = 0.407; P = 0.01), HDL-C (r = 0.334; P = 0.01), LDL-C (r = 0.270; P = 0.01), Apo-A1 (r = 0.427; P = 0.01), and Apo-B (r = 0.170; P = 0.01) concentrations.