EFFICACY OF ANTIVIRAL TREATMENT OF CHRONIC HEPATITIS C WITH PEG-IFN ALPHA-2B AND RIBAVIRIN IN COMBINATION WITH METFORMIN IN PATIENTS WITH HCV-1 GENOTYPE AND INSULIN RESISTANCE Article Khafisova O.O., Tarasova O., Mazurchik N., Ogurtsov P.P. HEPATOLOGY. WILEY-BLACKWELL. Vol. 58. 2013.