P.08.16 NEW IMPEDANCE-PH PARAMETERS OF GASTRO-ESOPHAGEAL REFLUX DISEASE: A LESSON FROM PATIENTS WITH CHRONIC AUTOIMMUNE ATROPHIC GASTRITIS, NON-EROSIVE REFLUX DISEASE AND FUNCTIONAL HEARTBURN. (24th February 2016) - Andrea, T.; Debortoli, N.; Mauro, A.; Frazzoni, M.; Savarino, E.; Massironi, S.; Marchi, S.; Penagini, R.