. 2016 Jan 25;69(1):83–90. doi: 10.5173/ceju.2016.663
Copyright by Polish Urological Association
This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) License, allowing third parties to copy and redistribute the material in any medium or format and to remix, transform, and build upon the material, provided the original work is properly cited and states its license.
Figure 1.
PRISMA flowchart of literature search.