O-027Pembrolizumab (Pembro) therapy vs best supportive care (BSC) in advanced hepatocellular carcinoma (HCC): KEYNOTE-240. (2nd July 2019) - Finn, R S; Ryoo, B-Y; Merle, P; Kudo, M; Bouattour, M; Lim, H-Y; Breder, V; Edeline, J; Chao, Y; Ogasawara, S; Yau, T; Garrido, M; et al.