Funding for this research was provided by:
Jiangsu Provincial Medical Youth Talent (QNRC2016800)
Science and Technology Planning Project of Xuzhou (KC16SL111)
Received: 25 April 2019
Accepted: 16 July 2019
First Online: 27 July 2019
Ethics approval and consent to participate
: This study has been approved by the Ethic Committee of the Affiliated Hospital of Xuzhou Medical University (NO. XYFY2008-aL050–04). Informed consent was obtained from all patients included in the study.
: Not applicable.
: The authors declare that they have no competing interests.