Lu, Songtao
Wei, Dongmei
Yin, Chao
Xiong, Juwen
Zhu, Lishuang
Yan, Shaoru
Meng, Rui
Article History
Received: 9 September 2020
Accepted: 13 June 2021
First Online: 29 June 2021
Declarations
:
: This research was approved by the Ethics Committee of Tangshan Worker Hospital and was conducted following the ethical standards of the Helsinki Declaration. Written informed consent was obtained from all the study subjects before enrollment.
: Not applicable.
: The authors declare that they have no competing interests.