Jiang, Ai-Guo
Cai, Xu
Article History
Received: 12 December 2020
Accepted: 7 December 2021
First Online: 3 January 2022
Declarations
:
: Our study had received the approval of the Institutional Review Board of Wenling Maternal and Child Health Care Hospital, and clinical information were obtained from medical management systems of hospital. All methods were carried out in accordance with relevant guidelines and regulations. Informed consent was obtained from all study participants.
: Not applicable
: The authors declare that they have no competing interests