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Peroral endoscopic myotomy: an evolving treatment for achalasia | Nature Reviews Gastroenterology & Hepatology
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New endoscopic classification of esophageal mucosa in achalasia: A predictor for submucosal fibrosis | Semantic Scholar
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Ling classification describes endoscopic progressive process of achalasia and successful peroral endoscopy myotomy prevents endoscopic progression of achalasia
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Figure 7 from The Pathogenesis and Management of Achalasia: Current Status and Future Directions | Semantic Scholar
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A New Preparation Method for Peroral Endoscopic Myotomy in Patients with Achalasia Can Effectively Reduce the Esophageal Residual Contents: A Comparative Retrospective Study
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