. 2018 Mar 30;18(72):63–70. doi: 10.15557/JoU.2018.0010
2018 Polish Ultrasound Society. Published by Medical Communications Sp. z o.o. All rights reserved.
This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License (CC BY-NC-ND). Reproduction is permitted for personal, educational, non-commercial use, provided that the original article is in whole, unmodified, and properly cited.