Fig. 2From: Comparison of fully coated anti-reflux metal stenting and per-oral endoscopic myotomy in patients with achalasia: a propensity score-matched retrospective studyTypical pictures of each type or subtype in Ling classification. A Type I; B Type IIa; C Type IIb; D Type IIc; E Type IIIl; F Type IIIr; G Type IIIlrBack to article page