Wang, Baoshan
Zhao, Lei
Chi, Weiwei
Cao, Huan
Cui, Weina
Meng, Wenxia
Article History
Received: 12 November 2018
Accepted: 31 May 2019
First Online: 13 June 2019
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of the Second Hospital, Hebei Medical University, and informed consent was obtained from all recruited subjects.
: Not applicable.
: The authors declare that they have no competing interests.