Article History
Received: 7 June 2019
Accepted: 18 August 2019
First Online: 23 August 2019
Ethics approval and consent to participate
: This study protocol was approved by the Institutional Research Ethics Committee of The First People’s Hospital of Hefei (No. 2016–6) and was registered in the Chinese Clinical Trial Registry ( , ChiCTR-IPR-17011462). Written informed consent was obtained from all patients.
: Not applicable.
: The authors declare that they have no competing interests.