Compare the safety of four oral doses of pradefovir after 48 weeks of treatment~Compare the antiviral activity of four oral doses of pradefovir to adefovir and dipivoxyl after 48 weeks of treatment~Select the dose of pradefovir for Phase 3 studies~Determine the pharacokinetic profiles of four oral doses of pradefovir
Compare the safety of four oral doses of pradefovir after 48 weeks of treatment~Select the dose of pradefovir for Phase 3 studies