At 2142 and 2143 sites of gene, A2143G and A2142G mutations were detected in 35.3% and 3.5%, respectively. Six remaining mutations were G2172T (0.6%), T2182C (86.5%), C2195T (5.3%), A2223G (42.9%), T2244C (98.2%) và A2302G (8.8%).