Funding for this research was provided by:
Shanghai Municipal Key Clinical Specialty, Shanghai, China
Received: 25 July 2020
Accepted: 21 October 2020
First Online: 7 November 2020
Ethics approval and consent to participate
: All clinical samples were obtained with the written informed consent of all participants. The Ethics Committee of the International Peace Maternity and Child Health Hospital of Shanghai Jiaotong University reviewed and approved this study (GKLW-2018-41).
: This manuscript was read and approved by all the authors.
: All authors declare that they have no conflicts of interests in this article.