既往内镜或外科治疗的贲门失弛缓症患者再行经口内镜下肌切开术的临床研究
기왕내경혹외과치료적분문실이완증환자재행경구내경하기절개술적림상연구
Peroral endoscopic myotomy for achalasia patients with and without prior endoscopic or surgical therapy
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