Funding for this research was provided by:
Suzhou Municipal Science and Technology Bureau (SYS201712)
Received: 4 September 2019
Accepted: 14 January 2020
First Online: 3 February 2020
Ethics approval and consent to participate
: The study was conducted in accordance with the Declaration of Helsinki (1964), following the approval from the Institutional Review Board of the First Affiliated Hospital of Soochow University (IRB No. 2017085). Written informed consent was obtained from all participants prior to participation.
: Not applicable.
: The authors declare that they have no competing interests.