Li, Jianfang
Qin, Changfu
Lai, Dandan
Hu, Yueming
Wang, Lichao
Funding for this research was provided by:
Beijing Hospitals Authority Youth Programme (QML20170307)
Article History
Received: 24 August 2019
Accepted: 3 November 2019
First Online: 26 November 2019
Compliance with ethical standards
:
: Jianfang Li, Changfu Qin, Dandan Lai, Yueming Hu, and Lichao Wang 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.
: This article does not contain any studies with animals performed by any of the authors.
: Informed consent was waived for this retrospective study.