Kou, Shuang
Zhang, Mei
Ji, Baolan
Zhao, Qianqian
Li, Yanying
Pan, Hui
Ban, Bo http://orcid.org/0000-0002-3950-1422
Li, Ping http://orcid.org/0000-0001-9893-284X
Article History
Received: 21 November 2019
Revised: 22 May 2020
Accepted: 29 May 2020
First Online: 9 June 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All authors have read and approved the content, and they agree to submit it for consideration for publication in the journal.
: The Human Ethics Committee of the Affiliated Hospital of Jining Medical University approved the study. All procedures were performed in accordance with ethical standards of the Declaration of Helsinki. All of the families of the patients were informed of the aims of the study, and written informed consent was obtained from the parents of the patients.