Guo, Hebing
Liu, Jingyuan
Pu, Lin
Hao, Jingjing
Yin, Ningning
Liu, Yufeng
Xiong, Haofeng
Li, Ang
Funding for this research was provided by:
Beijing Municipal Administration of Hospitals (ZYLX201827)
Article History
Received: 17 December 2019
Accepted: 28 February 2020
First Online: 11 March 2020
Ethics approval and consent to participate
: Because no trial of any specific therapeutic or prophylactic intervention was carried out, and only observational data were used for our analysis, an informed consent to participate for this study was not required according to our institution’s guidelines.This study was approved by the Ethics Committee of Beijing Ditan Hospital, Capital Medical University, No.2018–005-01.
: Not applicable.
: The authors declare that they have no competing interests.