The classic never dies. Efficacy of the classical method in biliary lithotripsy: fragmentation of biliary lithiasis by direct peroral cholangioscopy with electrohydraulic probe for the treatment of biliary lithiasis - Pérez, J. Pérez; Ortiz, J. Escobar; Francisco, G. G.; Carlos, V. P.; Martinez-Alcalá, A.; Angel, P. D. (Endoscopy, 2023)