. 2017 Aug 16;14(4):3720–3726. doi: 10.3892/etm.2017.4940
Copyright: © Xu et al.
This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.