RecruitingPhase 1Drug trialHepatic Intra-Arterial Administration of Ipilimumab in Combination With Intra-venous Nivolumab for Advanced Hepatocellular CarcinomaTo determine the Maximum Tolerated Dose (MTD), and the recommended Phase 2 dose of HIA Ipilimumab in combination with IV Nivolumab by monitoring the Dose Limiting Toxicity (DLT) within 1 month after IA Ipilimumab administration in dose-escalation phase.