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Article History

Received: 23 October 2022

Accepted: 29 June 2023

First Online: 25 July 2023

Declarations

:

: Ethics approval was granted by the Da Nang Hospital for Women and Children ethics review board on 21 June 2020 (register number 748). There was a delay in ethics approval resulting from a large COVID-19 outbreak, which explains why the post intervention period commenced nearly three months after baseline observations. Baseline observations were conducted as part of a clinical audit, without any intervention, and did not require ethics approval.

: Not applicable since the manuscript does not contain data from any individual person.

: The authors declare no competing interests.