Funding for this research was provided by:
the Shandong Key Research and Development Plan (2017CXGC1209, 2017GSF18164)
the Outstanding Youth Natural Science Foundation of Shandong Province (JQ201423)
the Jinan Clinical Medicine Science and Technology Innovation Plan (201704095)
National Natural Science Foundation of China (81372413, 81671785)
the Natural Science Foundation of Shandong Province (2016ZRC03118)
the National Key Research and Development Program of China (2016YFC0904700)
the Project of Invigorating Health Care through Science, Technology and Education (CXTDA2017034)
Received: 10 September 2018
Accepted: 7 March 2019
First Online: 15 March 2019
Ethics approval and consent to participate
: The clinical research committee of the study institute approved the study protocol, and written informed consent was waived by the Institutional Review Board .
: Not applicable.
: The authors declare that they have no competing interests.
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