1. Unsedated small-caliber esophagogastroduodenoscopy (EGD) versus conventional EGD: A comparative study 
Darius Sorbi, Christopher J. Gostout, Jessica Henry, Keith D. Lindor 
Gastroenterology 
Volume 117, Issue 6, Pages (December 1999)
DOI: /S (99)
Copyright © 1999 American Gastroenterological Association Terms and Conditions

2. Fig. 1
Small-caliber upper endoscope. (A) The distal tips of the small-caliber and the conventional esophagogastroduodenoscopes are shown for comparison, along with (B) the handle of the small-caliber endoscope.
Gastroenterology  , DOI: ( /S (99) )
Copyright © 1999 American Gastroenterological Association Terms and Conditions

3. Fig. 1
Small-caliber upper endoscope. (A) The distal tips of the small-caliber and the conventional esophagogastroduodenoscopes are shown for comparison, along with (B) the handle of the small-caliber endoscope.
Gastroenterology  , DOI: ( /S (99) )
Copyright © 1999 American Gastroenterological Association Terms and Conditions

4. Fig. 2
Image quality. Endoscopic image of an esophageal stricture as viewed by the (A) small-caliber and (B) conventional esophagogastroduodenoscopes.
Gastroenterology  , DOI: ( /S (99) )
Copyright © 1999 American Gastroenterological Association Terms and Conditions