Tao, Ning-ning
Li, Yi-fan
Liu, Yun-xia
Liu, Jin-yue
Song, Wan-mei
Liu, Yao
Geng, Hong
Wang, Shan-shan
Li, Huai-chen
Funding for this research was provided by:
the Science and Technology Development Plan of Shandong Province ((grant number 2017GSF218052))
Article History
Received: 23 November 2018
Accepted: 1 May 2019
First Online: 10 May 2019
Ethics approval and consent to participate
: The study was approved by the Ethic Committee of Shandong Provincial Hospital, affiliated to Shandong University. Consents from the participants were not required due to the anonymous nature of the data.
: Not applicable.
: The authors declare that they have no competing interests.
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