Ke, Ruili
Zhang, Min
Zhou, Qin
Yang, Yunfei
Shen, Ruifen
Huang, Huipin
Zhang, Xiangrong
Article History
Received: 30 November 2019
Accepted: 12 June 2020
First Online: 22 June 2020
Ethics approval and consent to participate
: This study was approved by the ethical committee of. The People’s Hospital of Longhua. Informed written consent was obtained from the parents or guardian of participants in the study.
: Not applicable.
: The authors declare that they have no competing interests.