Funding for this research was provided by:
Natural Sciences Foundation of Shandong Province, China (ZR2013BL014)
Natural Sciences Foundation of Shandong Province, China (ZR2016BQ33)
Natural Sciences Foundation of Shandong Province, China (ZR2012CL01)
Science and Technology Development Project of Taian City, China (2016GX1023)
Taishan Medical University (2015GCC20)
Taishan University (Y-01-2014013)