Text and Data Mining valid from 2019-11-04
Received: 11 April 2019
Accepted: 17 October 2019
First Online: 4 November 2019
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Lianyungang No 2 People’s Hospital, Lianyungang, China. The ethical committee process number is 2015062.
: Not applicable.
: The authors declare that they have no competing interests.