Yang, Jun http://orcid.org/0000-0002-1943-3979
Liu, Xu
Liao, Chengde
Li, Qinqing http://orcid.org/0000-0001-8595-9357
Han, Dan http://orcid.org/0000-0002-0408-9175
Funding for this research was provided by:
National Natural Science Foundation of China (81703155)
National Natural Science Foundation of China (81460264)
Article History
Received: 25 March 2019
Accepted: 16 May 2019
First Online: 24 May 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This research carried out in accordance with the ethical standards our institutional committee. This was a retrospective, single-center study approved by our institutional review board, and the requirement for informed written consent was waived.