Funding for this research was provided by:
Nanjing Medical University (2015NJMU064, 2017NJMU055)
National Natural Science Foundation of China (81602913, 81670155)
Natural Science Foundation of Jiangsu Province (BK20150085)
Jiangsu Provincial Commission of Health and Family Planning (Z201611)
Medical Science and Technology Development Foundation, Nanjing Municipality Health Bureau (YKK15140, QRX17164)
Text and Data Mining valid from 2019-02-06
Received: 16 May 2018
Accepted: 7 January 2019
First Online: 6 February 2019
Ethics approval and consent to participate
: The research protocol was approved by the Medical Ethics Committee of Nanjing Children’s Hospital affiliated to Nanjing Medical University. Written informed consent was obtained from the parents (or legal guardians) of all study subjects at the time of enrollment into this study.
: Not applicable.
: The authors declare that they have no conflict of interest.
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