1. Botox injection for achalasia: a modified technique
Jeffrey A. Goldstein, MD, Jamie S. Barkin, MD, FACP, MACG 
Gastrointestinal Endoscopy 
Volume 49, Issue 2, Pages (February 1999)
DOI: /S (99)
Copyright © 1999 American Society for Gastrointestinal Endoscopy Terms and Conditions

2. Fig. 1
Injection of botulinum toxin into the cardioesophageal junction with gastroscopic retroflexion.
Gastrointestinal Endoscopy  , DOI: ( /S (99) )
Copyright © 1999 American Society for Gastrointestinal Endoscopy Terms and Conditions