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Authors
Wu, Yanqiang
Fu, Xianghua https://orcid.org/0000-0002-8929-7669
Feng, Qiang
Gu, Xinshun
Hao, Guozhen
Fan, Weize
Jiang, Yunfa
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Article History
Received: 16 April 2019
Accepted: 12 June 2020
First Online: 26 June 2020
Ethics approval and consent to participate
: The study protocol was approved by the Ethics Committee of the Second Hospital of Hebei Medical University, and the study was conducted in accordance with the Declaration of Helsinki and Good Clinical Practice guidelines. Written informed consents were provided by all study participants.
: Not applicable.
: The authors declare that they have no competing interests.
