Li, Jing
Liang, Pan
Zhang, Dandan
Liu, Jie
Zhang, Hongkai
Qu, Jinrong
Gao, Jianbo
Funding for this research was provided by:
the National Natural Science Foundation of China (81271573)
Article History
Received: 9 October 2017
Accepted: 15 February 2018
First Online: 27 February 2018
Ethics approval and consent to participate
: The study protocol was approved by institutional review board, and the requirement for informed consent was waived due to the retrospective nature of the study.
: Not applicable.
: The authors declare that they have no competing interests.
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