Text and Data Mining valid from 2019-11-11
Received: 21 August 2019
Accepted: 9 October 2019
First Online: 11 November 2019
Ethics approval and consent to participate
: The study protocol was approved by the Ethics Committee of The First Affiliated Hospital of Nanchang University and the study compliance with the Helsinki Declaration. Written informed consent was obtained from all of the patients.
: Not applicable.
: The authors declare that they have no competing interests.