Wan, Zhihua
Zhang, Huan
Xu, Haigang
Hu, Yang
Tan, Cai
Tao, Yuling
Funding for this research was provided by:
National Health Commission of the People's Republic of China
Health Commission of Jiangxi Province
Article History
Received: 4 June 2020
Accepted: 6 October 2020
First Online: 27 October 2020
Ethics approval and consent to participate
: This study was approved by the Ethics committee of Jiangxi Maternal and Child Health Care Hospital (Approval No. EC-KY-202008). Administrative permissions from Health Commission of Jiangxi Province were acquired by our team to access the data used in our research.
: Not applicable.
: The authors declare that they have no competing interests.