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HBsAg levels according to disease stage. (a) Data from Hannover cohort. (b) Data from Pisa cohort. CHB patients in the low-replicative phase in the Hannover cohort have higher HBsAg levels than inactive carriers without liver disease in the Pisa cohort; chronic active hepatitis and cirrhotic patients in the Pisa cohort are comparable to those HBeAg-negative patients classified as immune clearance phase in the Hannover cohort.
