Guo, Yongsheng
Zou, Yingxue
Zhai, Jia
Li, Jiao
Liu, Jie
Ma, Cuian
Jin, Xingnan
Zhao, Liansheng
Article History
Received: 13 July 2018
Revised: 24 October 2018
Accepted: 7 December 2018
First Online: 15 January 2019
Competing interests
: The authors declare no competing interests.
: The study protocol was approved by the Ethic Committee of Tianjin Children’s Hospital and conducted in accordance with Helsinki’s Declaration. All the patients gave their written information consent.