Funding for this research was provided by:
International Cooperation and Exchange Programme (81761128018)
Major Research Plan (81572871)
Natural Science Foundation of Jiangsu Province (BK20151277)
Government of Jiangsu Province (201610304034Z, 201710304028Z)
Received: 13 February 2019
Accepted: 13 November 2019
First Online: 26 November 2019
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of the Affiliated Hospital of Nantong University. The study was performed on the basis of the protocol approved by the 1964 Declaration of Helsinki, and written informed consent was obtained from all patients.
: Informed consent was obtained from all participants for publication.
: The authors declare that they have no competing interests.