Zhou, Xi
Zhang, Qiang
Song, Wenhao
Zhou, Dongsheng
He, Yu
Article History
Received: 6 December 2016
Accepted: 16 May 2018
First Online: 29 May 2018
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Provincial Hospital Affiliated to Shandong University (No.2015028). Authors obtained written informed consent from all patients to participate this study.
: The authors declare that they have no competing interests.
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