Figure 1. Algorithm for the management of biliary calculus to reduce number of diagnostic ERCP. ERCP, endoscopic retrograde cholangiopancreatography; MRCP, magnetic resonance cholangiopancreatography; EUS, endoscopic ultrasound; GB, gallbladder; CBD, common bile duct; LFT, liver function test. ^aBased on the degree of suspicion and availability.