Liu, Mengqi
Zeng, Wenbin
Wen, Yun
Zheng, Yineng
Lv, Fajin
Xiao, Kaihu http://orcid.org/0000-0003-3768-2562
Article History
Received: 20 February 2020
Revised: 9 April 2020
Accepted: 28 April 2020
First Online: 12 May 2020
Compliance with ethical standards
:
: The scientific guarantor of this publication is Kaihu Xiao.
: The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article.
: No complex statistical methods were necessary for this paper.
: Written informed consent was waived by the Institutional Review Board.
: Institutional Review Board approval was obtained (Certification No: ChiCTR2000029952).
: No study subjects or cohorts have been previously reported before.
: • retrospective• cross sectional study•multicenter study
Free to read: This content has been made available to all.