Comparative Evaluation of PerOral Endoscopic Myotomy (POEM) for the Treatment of Achalasia in Patients With Failed Heller Myotomy vs Patients Without a History of Surgical Myotomy: A Multicenter Retrospective Cohort Study

Ngamruengphong, S; Inoue, H; Ujiki, M; Bapaye, A; Desai, Pn; Ponchon, T; Dorwat, S; Draganov, Pv; Perbtani, Yb; Abbas, A; Pannu, D; Yang, D; Perretta, S; Romanelli, J; Desilets, D; Hayee, B; Patel, Ly; Pioche, M; Roman, S; Rivory, J; Mion, F; Garros, A; Nakamura, J; Hata, Y; Balassone, V; Onimaru, M; Hajiyeva, G; Ismail, A; Chen, Yi; Bukhari, M; Chavez, Yh; Kumbhari, V; Maselli, R; Repici, A; Khashab, Ma