OC.05.9 LONG VS SHORT POEM FOR THE TREATMENT OF ACHALASIA. INTERIM ANALYSIS OF A RANDOMIZED CONTROLLED TRIAL. (24th February 2016) - Familiari, P.; Cali, A.; Landi, R.; Gigante, G.; Boskoski, I.; Santiago, A.Z.; Greco, S.; Barbaro, F.; Tringali, A.; Perri, V.; Costamagna, G.