1 Translational Obstetrics Group, Department of Obstetrics and Gynaecology, University of Melbourne, Heidelberg, Victoria 3084, Australia.
2 Mercy Perinatal, Mercy Hospital for Women, and Department of Obstetrics and Gynaecology, University of Melbourne, 163 Studley Road, Mercy Hospital, Heidelberg 3084,Victoria, Australia.
3 Department of Obstetrics and Gynaecology, National Referral Hospital, Honiara, Solomon Islands.
4 Department of Maternal and Child Health, Office of the WHO Representative in Solomon Islands, Honiara, Solomon Islands.
5 Maternal and Child Health Division, Ministry of Health of Solomon Islands, Honiara, Solomon Islands.