Application of EUS or MRCP prior to ERCP in patients with suspected choledocholithiasis in clinical practice - Mike J.P. de Jong; Megan M.L. Engels; Christa Sperna Weiland; Robin Krol; Tanya M. Bisseling; Erwin-Jan M. van Geenen; Peter Siersema; Foke van Delft; Jeanin E. van Hooft (Endoscopy International Open)