Li, Dan
Liu, Pujuan
Zhang, Huijun
Wang, Li
Article History
Received: 2 December 2020
Accepted: 16 March 2021
First Online: 25 June 2021
Declarations
:
: The study protocol was approved by the Ethics Committee of The Fourth Hospital of Hebei Medical University. Written informed consent was obtained from all the study subjects before enrollment.
: Not applicable.
: The authors declare that they have no competing interests.