 - For patients with unknown hepatitis B virus surface antigen HbsAg status, must be tested during study screening; patients who are tested positive test for HBsAg are excluded if they have inadequately controlled hepatitis B andor Child-Pugh Class B or C cirrhosis; however, patients with adequately controlled hepatitis are not excluded from the study if they satisfy all of the following criteria: i must be receiving a nucleoside analog anti-viral drug for 3 or more months; and ii have a serum hepatitis B virus HBV deoxyribonucleic acid DNA level of less than 100 IUml via polymerase chain reaction quantification assays prior to enrollment 