Funding for this research was provided by:
Baoding No.1 Central Hospital
Text and Data Mining valid from 2019-11-16
Received: 27 July 2019
Accepted: 5 November 2019
First Online: 16 November 2019
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Baoding No.1 Central Hospital, and all patients signed the informed consent forms.
: Not applicable.
: The authors declare that they have no competing interests.