Gong, Yahong
Xu, Xiaohan
Wang, Jin
Che, Lu
Wang, Weijia
Yi, Jie
Article History
Received: 9 August 2019
Accepted: 7 January 2020
First Online: 14 January 2020
Ethics approval and consent to participate
: The research was approved by the Institutional Review Board of Peking Union Medical College Hospital (PUMCH) (IRB No. S-631). Written informed consent was obtained from all individual participants included in the study.
: Not applicable.
: The authors declare that they have no competing interests.