Han, Dong
Jiang, Danni
Zhang, Jiahuan
Pei, Tianxu
Zhao, Qi
Article History
Received: 23 October 2017
Accepted: 13 June 2018
First Online: 19 June 2018
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of the Second Affiliated Hospital of Dalian Medical University and it was performed in accordance with the tenets of the Declaration of Helsinki. A verbal consent was obtained from the parents of patients. (When patients and their parents came to see a doctor, we will ask whether we can collect the data of their children to conduct the research, and we started collecting When they agreed). and the oral consent has been approved by the Ethics Committee of the Second Affiliated Hospital of Dalian Medical University.
: The parents of patients agreed to collect and publish the data of their children.
: All authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest, or non-financial interest in the subject matter or materials discussed in this manuscript. The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.