Funding for this research was provided by:
FP7 Ideas: European Research Council (HEALTH-F3-2012-306090)
Medical Research Council (MR/T003324/1)
Received: 18 October 2019
Accepted: 6 May 2020
First Online: 29 May 2020
Ethics approval and consent to participate
: The Liverpool School of Tropical Medicine Master Review Panel 2016 (09) and the Research and Ethical Committee of University Hassanudin (UH 14120659) approved the study. Permission and access to antenatal records was granted by Badan Kesatuan Bagsa Dan Politik Kabupaten, Cianjur. Written informed consent was given by each participant prior to inclusion in the study.
: Written informed consent was obtained from all participants. Within this, specific consent was sought for use of direct quotations in publication.
: The authors declare that they have no competing interests.