Abbreviations
From the following article
Medical and endoscopic management of achalasia
Nonko Pehlivanov and Pankaj Jay Pasricha
GI Motility online (2006)
doi:10.1038/gimo52
BoT-A
Botulinum toxin A
DES
diffuse esophageal spasm
LES
lower esophageal sphincter
PD
pneumatic dilation