Funding for this research was provided by:
National Natural Science Foundation of China (13ZR1405200)
Natural Science Foundation of Shanghai (13ZR1405200)
Shanghai Municipal Commission of Health and Family Planning (20164Y0122)
Text and Data Mining valid from 2019-08-10
Received: 4 April 2019
Accepted: 17 July 2019
First Online: 10 August 2019
Compliance with ethical standards
: The study was performed in accordance with the Declaration of Helsinki and its amendments. Protocols were approved by the Ethics Committee of Shanghai Children’s Hospital and written informed consents were obtained from all subjects.
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with animals performed by any of the authors.