Han, Yuan
Han, Liu
Dong, Mengmeng
Sun, Qingchun
Ding, Ke
Zhang, Zhenfeng
Cao, Junli
Zhang, Yueying
Article History
Received: 11 July 2017
Accepted: 4 January 2018
First Online: 24 January 2018
Ethics approval and consent to participate
: This study and its protocol were approved by the Institutional Medical Ethics Committee of Xuzhou Medical University (xyfylw2014036). Written informed consent was obtained from all subjects.
: Not applicable.
: The authors declare that they have no competing interests.
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