Tian, Zhichao
Liu, Huimin
Zhang, Fan
Li, Liangyu
Du, Xinhui
Li, Chao
Yang, Jinpo
Wang, Jiaqiang http://orcid.org/0000-0002-4978-1501
Article History
Received: 4 December 2019
Accepted: 12 February 2020
First Online: 25 February 2020
Compliance with ethical standards
:
: All authors who took part in this study indicate that they do not have anything to declare regarding funding or conflicts of interest with respect to this study.
: 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.
: Formal consent was not required for this type of study.
: Not applicable.
: All data generated or analysed during this study are included in this published article.
: Not applicable.