Funding for this research was provided by:
National Natural Science Foundation of China (81303108)
Text and Data Mining valid from 2019-01-03
Received: 31 October 2018
Revised: 29 November 2018
Accepted: 5 December 2018
First Online: 3 January 2019
Ethics approval and consent to participate
: Written informed consent was obtained from each donor, and this study was approved by the ethics committee of Tianjin Medical University (IRB2018-YX-089).
: Not applicable.
: The authors declare that they have no competing interests.
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