Liu, Jie
Huang, Rong
Xiao, Yi
Lin, Songbai
Article History
Received: 10 July 2019
Revised: 9 December 2019
Accepted: 19 December 2019
First Online: 9 January 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 Peking Union Medical College Hospital committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.