Funding for this research was provided by:
Science and Technology Commission of Shanghai Municipality (No.17411965300)
Shanghai Municipal Commission of Health and Family Planning (No.2017ZZ02026; No.2016ZB0103; and No.20164Y0095)
the Fourth Round of Three-Year Public Health Action Plan (GWIV-36)
National Natural Science Foundation of China (CN) (No. 81602870; No. 81602868; No. 81728017)
Text and Data Mining valid from 2019-07-10
Received: 7 September 2018
Accepted: 17 May 2019
First Online: 10 July 2019
Ethics approval and consent to participate
: The study obtained an ethical approval from the Institutional Review Boards of the Shanghai Children’s Medical Center affiliated to Shanghai Jiao Tong University School of Medicine. Written informed consents were obtained from all the participants in this study.
: Not applicable.
: The authors declare that they have no competing interests.