Wang, Ziqiang
Zhou, Liangliang
Lin, Bin
Song, Keran
Niu, Qinghe
Ren, Dongfeng
Tang, Jiaguang
Article History
Received: 18 October 2017
Accepted: 8 January 2018
First Online: 2 February 2018
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of the First Affiliated Hospital of General Hospital of PLA. Because of the retrospective nature of the study, informed consent was waived.
: Not applicable.
: The authors declare that they have no competing interests.
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