Inclusion Criteria:  Patients older than 18-years-old with informed consent  Exclusion Criteria:  Patients on anti-coagulation Patients with condition that increases the risk of urolithiasis (e.g. cystinuria, hyperparathyroidism, previous intestinal resection) Patients with abnormal urinary tract (e.g. ileal conduit, neobladder, ureteric stricture) Patients with stones > 15 mm