Funding for this research was provided by:
National Natural Science Foundation of China (81401709)
Key Technology Research and Development Program of Shandong (2016GSF201122)
Natural Science Foundation of Shandong Province (ZR2017MH044)
the Key Research Foundation of Shandong Province, China (2015GSF118114)
Resident standardized training research of Qilu Hospital of Shandong University (ZPZX2017A05)
Qilu Hospital Clinical Practical New Technology Fund (none)
Text and Data Mining valid from 2020-02-12
Received: 22 August 2019
Accepted: 29 January 2020
First Online: 12 February 2020
Ethics approval and consent to participate
: This study was approved by the ethics committee of Qilu Hospital, Shandong University, Jinan, People’s Republic of China (protocol KYLL-2019 (KS)-125). All subjects provided written informed consent before their inclusion in the study.
: Not applicable.
: The authors declare that they have no competing interests.