Yang, Chengguang
Zhuang, Wenfang
Hu, Yuemei
Zhu, Leiming
Article History
Received: 18 September 2017
Accepted: 26 December 2017
First Online: 22 January 2018
Ethics approval and consent to participate
: The study was carried on after acquiring patients’ consent and Tongren Hospital ethics committee approval and consent.
: Not applicable.
: The authors declare that they have no competing interests.
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