Funding for this research was provided by:
National Natural Science Foundation of China Grants (81670757, 81570742)
the development of science and technology of Shandong Province (2010GSF10228)
development of science and technology of Shandong Province (2012GGH11862, 2014GSF118118)
Shandong Provincial Natural Science Foundation of China Grants (ZR2016HQ26, Y2008C73, ZR2010HM044)
Shandong Provincial Science and Technology Development Program, China (2009GGB14001)
Excellent Young and Middle-aged Scientists of Shandong Province (2004BS02016)
the development of science and technology of JiNan City (201602172)
Received: 12 June 2018
Accepted: 11 December 2018
First Online: 7 January 2019
Ethics approval and consent to participate
: The study was approved by the ethical committee of Qianfoshan Hospital Affiliated to Shandong University.
: Not applicable.
: The authors declare that they have no competing interest.
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