6Smith CD,Stival A,Howell DL,et al.Endoscopic therapy for achalasia before Heller myotomy results in worse outcomes than heller myotomy alone[J].Ann Surg,2006,243(5):579-584.
8Kahdlas PJ. Esophageal motility disorders: current concepts of pathogenesis and treatment. Can J Gastroenterol,2000; 14:221.
9Vaezi MF, Richter JE, Wilcox CM, et al. Botutinum toxin versus pneumatic dilatation in th treatment of achalasia: a randomized trial.Gut, 1999;44:231.
10Peraqini K. Ballon dilatation is th first- choice for Achalasia Scand J Gastroenterol, 2002 ; 37: 380.
