Text and Data Mining valid from 2019-10-25
Received: 29 July 2019
Accepted: 9 October 2019
First Online: 25 October 2019
Ethics approval and consent to participate
: All the participants signed the informed consent for sample acquisition for research purposes. The protocols of this study were approved by the Ethics Committee of Binzhou People’s Hospital.
: Not applicable.
: The authors declare that they have no competing interests.