P.04.6 MODELING THE TIME-RELATED FLUCTUATIONS OF AFP AND PIVKA-II SERUM LEVELS IN PATIENTS WITH CIRRHOSIS UNDERGOING SURVEILLANCE FOR HEPATOCELLULAR CARCINOMA. (25th March 2019) - Ricco, G.; Cosma, C.; Bedogni, G.; Biasiolo, A.; Guarino, M.; Pontisso, P.; Morisco, F.; Oliveri, F.; Cavallone, D.; Bonino, F.; Plebani, M.; Brunetto, M.R.