Liao, Ying
Tu, Chunhua
Song, Xiaoxia
Cai, Liping
Article History
Received: 18 November 2019
Accepted: 14 April 2020
First Online: 30 April 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.
: Informed consent was obtained from all individual participants included in the study.