Tong, Yuexin
Huang, Zhangheng
Hu, Chuan
Fan, Zhiyi
Bian, Fucheng
Yang, Fengkai
Zhao, Chengliang
Article History
Received: 26 January 2020
Accepted: 23 April 2020
First Online: 11 May 2020
Ethics approval and consent to participate
: This research was approved by the ethics committee of Affiliated Hospital of Chengde Medical University. All participants agreed with the data and publication of the manuscript.
: Written informed consent was obtained from all participants.
: The authors declare that they have no competing interests.