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Ahn YE, Suh SJ, Kim TH, Jung YK, Yim HJ.  Maintaining Antiviral Efficacy after Switching to Generic Entecavir 1 mg for Antiviral-resistant Chronic Hepatitis B.  Korean J Gastroenterol -0001;0:-.  https://doi.org/10.4166/kjg.2020.0144