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Authors
Zhang, Lijing
Kang, Liqing
Li, Guoce
Zhang, Xin
Ren, Jialiang
Shi, Zhongqiang
Li, Jiayue
Yu, Shujing
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Article History
Received: 26 October 2019
Accepted: 16 January 2020
First Online: 11 February 2020
Compliance with ethical standards
:
: All the authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee (Cangzhou Central Hospital + ER3N) and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: For this type of study, formal consent is not required.
