Chen, Liang
Han, Xiudi
Li, Yan Li
Zhang, Chunxiao
Xing, Xiqian
Funding for this research was provided by:
Beijing JST research (ZR-201921)
Article History
Received: 12 February 2020
Accepted: 30 April 2020
First Online: 8 May 2020
Ethics approval and consent to participate
: The study was carried out according to Declaration of Helsinki and obtained the approval of the local Ethics Committee (Beijing Jishuitan Hospital). Protocol number 201911–15. Given the retrospective nature of the study, the Ethics Committee determined that an informed consent was not necessary.
: Not applicable.
: The authors declare that they have no confict of interest.