Sun, Jing-yang
Ni, Ming
Ma, Hai-yang
Du, Yin-qiao
Shen, Jun-min
Chen, Ji-ying
Zhou, Yong-gang
Zhang, Guo-qiang
Article History
Received: 29 December 2019
Accepted: 11 May 2020
First Online: 24 May 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Committee and in accordance with the standards of the National Research Council. All procedures were conducted in compliance with the guidelines of the Declaration of Helsinki. Written informed consent was obtained from all participants.
: We have obtained consent for publication.
: The authors declare that they have no competing interests.