Funding for this research was provided by:
National Natural Science Foundation of China (81870193)
Medical Science and Technology Development Project of Nanjing (YKK14080)
Received: 4 August 2019
Accepted: 20 September 2019
First Online: 7 November 2019
Ethics approval and consent to participate
: This study was approved by The Ethics Committee of Nanjing First Hospital. All patients agreed that their stored material was enclosed and that their clinical data were anonymously used for statistical analysis.
: Written informed consent was obtained from the patient before publication.
: The authors declare that they have no competing interests.