Chen, Yiwen Externalized Ureteral Catheter Versus Double-J Stent in Tubeless Percutaneous Nephrolithotomy for Upper Urinary Stones: A Systematic Review and Meta-Analysis. [electronic resource] - Journal of endourology 07 2018 - 581-588 p. digital Publication Type: Journal Article; Meta-Analysis; Systematic Review ISSN: 1557-900X Standard No.: 10.1089/end.2018.0066 doi Subjects--Topical Terms: HumansLength of StayNephrolithotomy, Percutaneous--methodsNephrostomy, PercutaneousOperative TimeStentsUrinary Calculi--surgeryUrinary Catheters