Text and Data Mining valid from 2018-10-17
Received: 10 May 2018
Accepted: 29 August 2018
First Online: 17 October 2018
Compliance with Ethical Standards
: All authors declare they have no conflicts of interest.
: Our manuscript complies with the Ethical Rules applicable for this journal. The ethic approval was obtained from the Ethic Committee of the Shanghai Children’s Hospital, and was in accordance with the Helsinki Declaration.
: All participants have signed the informed consent form before the study.