Funding for this research was provided by:
National Natural Science Foundation of China (81802190, 81772412)
China Postdoctoral Science Foundation (2019M652329)
Shandong Medical and Health Technology Development Plan Project (2017WS033)
Youth Fund Project of the Affiliated Hospital of Qingdao University (2017)
Shandong Provincial Science Foundation, China (ZR2019BH084)
Taishan Scholars Program (tsqn201909190)
Applied Basic Research Project of Qingdao (19-6-2-51-cg)
Received: 28 February 2020
Accepted: 5 May 2020
First Online: 2 June 2020
Ethics approval and consent to participate
: The work described was carried out following the Code of Ethics of the World Medical Association (Declaration of Helsinki), and this study was approved and supervised by our institutional ethics committee at Affiliated Hospital of Qingdao University (approval number: QDFY WZ 2018-3-1-02). Written informed consent for inclusion in the study was obtained from all patients.
: Not applicable.
: The authors declare that they have no competing interests.