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Antiviral therapy algorithm for chronic hepatitis B patients in the gray zone. HBsAg, hepatitis B surface antigen; HBeAg, hepatitis B e antigen; HBV, hepatitis B virus; ALT, alanine aminotransferase; AST, aspartate aminotransferase; VCTE, vibration-controlled transient elastography; MRE, magnetic resonance elastography.
