Chai, Songshan
Xu, Hao
Xiao, Dongdong
Wang, Jiajing
Wang, Yihao
Li, Junjun
Fu, Peng
Pool, Hendrik
Xiong, Nanxiang http://orcid.org/0000-0001-5306-1155
Article History
Received: 4 July 2020
Accepted: 16 November 2020
First Online: 20 November 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: The requirement for informed consent was waived owing to its retrospective design.