Luan, Chong
Xu, Dong-Tan
Chen, Ning-Jie
Wang, Fei-Fei
Tian, Kang-Song
Wei, Chao
Wang, Xian-Bin
Article History
Received: 2 April 2020
Accepted: 2 July 2020
First Online: 7 July 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of the ZIBO central hospital and in accordance with the standards of the National Research Council. Written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.