Funding for this research was provided by:
Guizhou Science and Technology Department (QKH LH7491#)
Received: 30 January 2019
Accepted: 19 August 2019
First Online: 28 August 2019
Ethics approval and consent to participate
: This study was approved by the local Ethics Committee of The Affiliated Hospital of Zunyi Medical University. Written consent was obtained from all participants.
: We have obtained written consent to publish and report individual patient data from the participants.
: The authors declare that they have no competing interests.