Funding for this research was provided by:
National Natural Science Foundation of China (81770710, 81470939)
Text and Data Mining valid from 2019-08-06
Received: 24 April 2019
Accepted: 22 July 2019
First Online: 6 August 2019
Ethics approval and consent to participate
: This study was conducted according to the principles of the Declaration of Helsinki and was approved by the Research Ethics Committee of The Children Hospital of Zhejiang University School of Medicine (20151010) after informed consent was obtained from the patients.
: None part of this manuscript has been or to be considered for publication elsewhere.
: The authors declare that they have no competing interests.