Wu, Xiaohui
Zhou, Chunju
Jin, Ling
Liu, Hui
Liu, Jinrong
Zhao, Shunying
Article History
Received: 18 September 2018
Accepted: 25 January 2019
First Online: 8 February 2019
Ethics approval and consent to participate
: The protocol of this study received Ethics Committee approval from Beijing Children’s Hospital.
: All patient guardians gave informed consent to the publication of this study.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.