Zhang, Chong
Xiang, Tingxiu
Li, Shuman
Ye, Lin
Feng, Yixiao
Pei, Lijiao
Li, Lili
Wang, Xiangyu
Sun, Ran
Ren, Guosheng
Tao, Qian
Article History
Received: 16 January 2018
Revised: 10 April 2018
Accepted: 17 April 2018
First Online: 14 May 2018
Ethics approval and consent to participate
: All participants provided written consent before enrolment. This study was approved by the Ethics Committees of the First Affiliated Hospital of Chongqing Medical University and conformed to the tenets of the Declaration of Helsinki.
: I confirm this manuscript is original. If accepted, the article will not be published elsewhere without the written consent of the publisher.
: The authors declare that they have no conflict of interest.