Cheng, Kai-Yuan
Feng, Bin
Peng, Hui-Ming
Bian, Yan-Yan
Zhang, Lin-Jie
Han, Chang
Qiu, Gui-Xing
Weng, Xisheng
Article History
Received: 5 October 2019
Accepted: 23 December 2019
First Online: 4 January 2020
Ethics approval and consent to participate
: The protocol of this study was approved by the Institutional Review Board (IRB) of Peking Union Medical College Hospital on 25th Oct, 2016 (Certification of IRB approval in Chinese is available in the supplementary files). All patients participating in this trial signed informed consent.
: It is not applicable to this study.
: The authors declare that they have no competing interests.