Funding for this research was provided by:
National Natural Science Foundation of China (81702169)
Nursery Foundation of People’s Liberation Army General Hospital (17KMM12)
Clinical Support Foundation of People’s Liberation Army General Hospital (2017FC-TSYS-3015, 2017FC-TSYS-2043)
Received: 7 June 2017
Accepted: 17 July 2018
First Online: 28 July 2018
Ethics approval and consent to participate
: Not applicable
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: The authors declare that they have no competing interests.
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