GPT and hepatitis B virus infection: Finally we studied the dynamic variations of ALT and HBV markers in 18 paired sera from 9 REL after Peg-IFN at the time of their on-treatment disease remission and hepatitis-B-relapse after treatment discontinuation and in 10 paired sera from 5 untreated HBeAg-negative-CHB patients with spontaneous remissions and reactivations.