F2 and Leigh syndrome: The laboratory results of LS group were as follows: white blood cell count (6.10 ± 2.44) ×109/L, red blood cell count (3.76 ± 0.63) ×1012/L, platelet count (184 ± 68.2) ×109/L, hemoglobin (112 ± 16.8) g/L, prothrombin time (11.6 ± 1.22) s, total bilirubin (155.3 ± 103.3) μmol/L, direct bilirubin (136.1 ± 82.18) μmol/L, and CA-199 (880.0 ± 857.0) U/mL, which were not significantly different from those in the OS group (P>0.05).