- Alpha-fetoprotein (AFP) less than or equal to 20 ng/mL obtained within 3 months prior to entry. Patients with 20 ng/mL less than or equal to AFP less than or equal to 100ng/mL may be enrolled after a normal biphasic abdominal CT within the previous 3 months if patients have Stage III/IV fibrosis and after a normal ultrasound if patients have Stage I/II fibrosis. If AFP is more than 100 but less than 200 ng/dL, all patients need to have a negative biphasic CT within 3 months.