Funding for this research was provided by:
National Natural Science Foundation of China (U1738102)
Zhejiang Provincial Science and Technology Program (2016KYB254)
Hangzhou City Science and Technology Program (20171226Y96)
Text and Data Mining valid from 2019-05-31
Received: 22 January 2019
Revised: 20 March 2019
Accepted: 14 April 2019
First Online: 31 May 2019
Ethics approval and consent to participate
: All animal experiments were approved by the Institutional Animal Care and Use Committee of Zhejiang Chinese Medical University (approval number 10296). The donor of the urine samples and placentas provided written informed consent. Placentas were collected after obtaining informed consent with the compliance of the local institutional review board (Xiaoshan Traditional Chinese Medical Hospital, Hangzhou, Zhejiang, China).
: Not applicable
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.