Fig. 2.
Flowchart of enrolled patients.
GB, gallbladder; CBD, common bile duct; ERCP, endoscopic retrograde cholangiopancreatography; US, ultrasonography; EST, endoscopic sphincterotomy.
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.