Funding for this research was provided by:
China Scholarship Council (201706225013)
the Basic Research for Natural Science Project of Shandong University (2015TS014)
Text and Data Mining valid from 2019-08-06
Received: 12 February 2019
Accepted: 23 July 2019
First Online: 6 August 2019
Ethics approval and consent to participate
: All procedures performed in studies involving animals were carried out in accordance with the guidelines of the National Institutes of Health and the legal requirements in China. All animal protocols were approved by the Ethics Committee on Animal Experiments of the Second Hospital of Shandong University (No. KYLL-2014LW01). All efforts were made to minimize the number of animals used and their suffering.
: Not applicable.
: The authors declare that they have no competing interests.