Regional differences in admissions and treatment outcomes for hepatocellular carcinoma patients in Thailand de réir Kitiyakara, T, Leerapun, A, Sutthivana, C, Poovorawan, K, Pan-ngum, W, Soonthornworasiri, N, Chaiteerakij, R, Treeprasertsuk, S, Phaoswasdi, K, Mairiang, P, Kositchaiwat, C