NCT03794440 2021-01-22A Study to Evaluate the Efficacy and Safety of Sintilimab in Combination With IBI305 (Anti-VEGF Monoclonal Antibody) Compared to Sorafenib as the First-Line Treatment for Advanced Hepatocellular Carcinoma.Innovent Biologics (Suzhou) Co. Ltd.Phase 2/3 Unknown595 enrolled