Hou, Kun http://orcid.org/0000-0001-7112-7883
Xu, Kan http://orcid.org/0000-0001-8947-1172
Chen, Xuan
Ji, Tiefeng
Guo, Yunbao
Yu, Jinlu http://orcid.org/0000-0003-2329-7946
Article History
Received: 12 July 2019
Revised: 8 October 2019
Accepted: 29 October 2019
First Online: 13 November 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: Informed consent was obtained from all individual participants included in the study.