Funding for this research was provided by:
Key Project of Education Department of Anhui Province (KJ2018A0229)
Science and Technology Development Fund of Bengbu Medical College (BYKF1736)
Received: 29 March 2019
Accepted: 8 July 2019
First Online: 16 July 2019
Ethics approval and consent to participate
: All investigations were conducted in conformity with the Helsinki Declaration and the study protocol was approved by our institutional review board (Ethics Committee of Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Approval No, XHEC-D-2016-008). All patients received a thorough explanation of this study and gave their oral and written informed consent to be included in this analysis.
: Consent for publication was obtained from all patients.
: The authors declare that they have no competing interests.