837 PERORAL ENDOSCOPIC MYOTOMY (POEM): ANTERIOR VERSUS POSTERIOR APPROACH, A RANDOMIZED SINGLE-BLINDED CLINICAL TRIAL
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Robert A. Moran | A. Kalloo | T. Ponchon | M. Canto | V. Kumbhari | M. Khashab | Mohammed S. Abusamaan | V. Wong | M. Pioche | V. Billioux | Kumi Ogihara | H. Shiwaku | Olaya I. Brewer Gutierrez | O. Sanaei | Amr Ismail | S. Ngamruengphong | Juliana Yang | Mohamad H. El Zein | N. Eleftheriadis | Philip Wai Yan W. Chiu