P.04.6 PRIMARY HUMAN BILIARY TREE STEM/PROGENITOR CELLS (HBTSCS) EXPOSED TO MICROENVIRONMENTAL FACTORS SHOWED PROLIFERATION, EPITHELIAL-MESENCHYMAL TRANSITION (EMT) AND SENESCENCE, RECAPITULATING THE PATHOLOGICAL FEATURES TYPICAL OF HUMAN CHOLANGIOPATHIES. Issue 2 (15th March 2018) - Costantini, D.