Funding for this research was provided by:
Bill and Melinda Gates Foundation (46099)
European Union (FP7-2007-Health)
Pfizer Inc (WS394663)
Received: 21 May 2019
Accepted: 22 August 2019
First Online: 2 September 2019
Ethics approval and consent to participate
: The study was approved by the PNG Institute of Medical Research (PNGIMR) Institutional Review Board (0815), the PNG Medical Research Advisory Council (08.01), and the Melbourne Health Human Research Ethics Committee (2008.162). The study was conducted in accordance with Good Clinical Practice guidelines (ICH GCP E6). All women provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.