Funding for this research was provided by:
National Natural Science Foundation of China (81471436, 81771548)
Received: 27 July 2018
Accepted: 12 April 2019
First Online: 6 May 2019
Ethics approval and consent to participate
: This article does not contain any studies with animals performed by any of the authors. All procedures performed in studies involving human participants were in accordance with the ethical standards of the Ethics Committee of Shanghai First Maternity and Infant Hospital. The study protocol was approved by the Ethical Committee of the Tongji University School of Medicine. Infant Hospital and committee reference number is KS18109. Written informed consent was obtained from all participants.
: Not applicable.
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