OC.16.8: Sequential Ultrasonographic Approach to Treatment of Malignant Obstruction of the Common Bile Duct. (15th March 2017) - Armellini, E.; Ballarè, M.; Montino, F.; Orsello, M.; Stradella, D.; Giudici, G.; Tari, R.; Saettone, S.; Donato, G.; Occhipinti, P.