Fig. 4.
Measurement of ulcer size. The ESD-induced ulcer size was assessed by area; long and short axes (mm) of an assumed ellipse were measured using an endoscope and measuring equipment, and the ulcer size was calculated.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.