Funding for this research was provided by:
NUS Department of Psychological Medicine Other Operating Expenses (R-177-000-003-001)
NUS iHeathtech Other Operating Expenses (R-722-000-004-731)
Received: 9 August 2021
Accepted: 20 July 2022
First Online: 9 August 2022
: The Institutional Review Board of the Hanoi Obstetrics and Gynecology Hospital approved the study protocol (Code: 07 QD/PS-TTĐT). Participants were asked to give written or verbal informed consent and were informed that they could withdraw at any time. All methods were performed in accordance with the relevant guidelines and regulations.
: Not applicable.
: The authors declare that they have no competing interests.