. 2018 Dec 7;17(2):1390–1394. doi: 10.3892/etm.2018.7072
Copyright: © Qu 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.