Ouyang, Ming-li
Xia, Hu-wei
Xu, Man-man
Lin, Jie
Wang, Li-li
Zheng, Xiang-wu
Tang, Kun
Article History
Received: 20 February 2019
Accepted: 5 June 2019
First Online: 10 June 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interests.
: The local Institutional Review Board approved this study. Since this was a retrospective study with secondary data, the Local Ethics Committee did not request individual informed consent.