. 2017 Mar;38(3):198–203. [Article in Chinese] doi: 10.3760/cma.j.issn.0253-2727.2017.03.005
2017年版权归中华医学会所有
Copyright © 2017 by Chinese Medical Association
This work is licensed under a Creative Commons Attribution 3.0 License (CC-BY-NC). The Copyright own by Publisher. Without authorization, shall not reprint, except this publication article, shall not use this publication format design. Unless otherwise stated, all articles published in this journal do not represent the views of the Chinese Medical Association or the editorial board of this journal.