Xu, Hong
Zhang, Shaoyun
Xie, Jinwei
Lei, Yiting
Cao, Guorui
Chen, Guo
Pei, Fuxing
Funding for this research was provided by:
Department of Science and Technology for Social Development (201302007)
Article History
Received: 13 December 2018
Accepted: 7 June 2019
First Online: 24 June 2019
Ethics approval and consent to participate
: Not applicable. This study was a secondary analysis of a large database and deemed exempt by the hospital’s institutional review board (2012–268).
: Not applicable. No conflict of interest exits in the submission of this manuscript, and manuscript is approved by all authors for publication.
: The authors declare that they have no competing interests.