Nabi Z, Ramchandani M, Sayyed M, Chavan R, Darisetty S, Goud R, Murthy HVV, Reddy DN.  Comparison of Short Versus Long Esophageal Myotomy in Cases With Idiopathic Achalasia: A Randomized Controlled Trial.  J Neurogastroenterol Motil 2021;27:63-70.  https://doi.org/10.5056/jnm20022