He, Xiaoqing
Zhao, Xiaoya
Wang, Xiaofeng
Liang, Guiling
Qi, Hang
Zhu, Chenfeng
Huang, Zhen
Zhang, Jian http://orcid.org/0000-0003-3664-5807
Article History
Received: 1 May 2020
Accepted: 28 October 2020
First Online: 11 January 2021
Compliance with ethical standard
:
: We declare that we have no financial and personal relationships with other people or organizations that can inappropriately influence our work; there is no professional or other personal interest of any nature or kind in any product, service and/or company that could be construed as influencing the position presented in, or the review of, the manuscript entitled.
: This study was approved by the institutional review board of the International Peace Maternity and Child Health Hospital in Shanghai, China; Approval number GKLW-2018-41.
: Not applicable.
: Not applicable.