GSTM1 and retinopathy of prematurity: CBC parameters such as haemoglobin (Hb) (16.90 ± 2.62) and haematocrit (Hct) (50.59 ± 7.56) values were lower and WBC (10.82 ± 6.49) and CRP (1.08 ± 4.42) was higher in infants with ROP.