title: Response.
authors.affiliation: Endoscopy Center and Endoscopy Research Institute, Zhongshan Hospital, Fudan University, Shanghai, China.
authors.forename: Ming-Yan
authors.initials: MY
authors.lastname: Cai
authors.affiliation: Endoscopy Center and Endoscopy Research Institute, Zhongshan Hospital, Fudan University, Shanghai, China.
authors.forename: Ping-Hong
authors.initials: PH
authors.lastname: Zhou
authors.affiliation: Endoscopy Center and Endoscopy Research Institute, Zhongshan Hospital, Fudan University, Shanghai, China.
authors.forename: Li-Qing
authors.initials: LQ
authors.lastname: Yao
mesh_terms: D016145:Endoscopy, Digestive System; D004931:Esophageal Achalasia / Q000601:surgery*; D049630:Esophageal Sphincter, Lower / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D011183:Postoperative Complications / Q000000981:diagnostic imaging*; D011859:Radiography