P.06.11 TAILORED THERAPY DRIVEN BY MULTICHANNEL INTRALUMINAL IMPEDANCE PH MONITORING: A RETROSPECTIVE STUDY IN REFRACTORY NON EROSIVE REFLUX DISEASE. Issue 2 (15th March 2018) - Ranaldo, N.; Losurdo, G.; Iannone, A.; Principi, M.B.; Barone, M.; De Carne, M.; Ierardi, E.; Di Leo, A.