OC.04.3 FIRST-LINE IMMUNE CHECKPOINT INHIBITOR-BASED SEQUENTIAL THERAPIES FOR ADVANCED HEPATOCELLULAR CARCINOMA: A RATIONALE FOR FUTURE TRIALS. (September 2021) - Cabibbo, G.; Celsa, C.; Battaglia, S.; Enea, M.; Rizzo, G.E.M.; Busacca, A.; Petta, S.; Calvaruso, V.; Di Marco, V.; Craxì, A.; Cammà, C.