Liu, Chunlei
Yi, Xiuling
Article History
Received: 18 March 2020
Accepted: 14 July 2020
First Online: 24 July 2020
Ethics approval and consent to participate
: This study was designed and performed with the approval from the Ethics Committee of Weifang People’s Hospital, and a written informed consent was obtained from each participant.
: A written informed consent for publication was obtained from each participant.
: The authors declare that they have no competing interests.