. 2018 Jun 2;21(4):193–196. doi: 10.1016/j.cjtee.2018.03.004
© 2018 Daping Hospital and the Research Institute of Surgery of the Third Military Medical University. Production and hosting by Elsevier B.V.
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).