[1] Univ Melbourne, Translat Obstet Grp, Dept Obstet & Gynaecol, Heidelberg, Vic 3084, Australia
[2] Univ Melbourne, Mercy Perinatal, Mercy Hosp Women, Mercy Hosp, 163 Studley Rd, Heidelberg, Vic 3084, Australia
[3] Univ Melbourne, Dept Obstet & Gynaecol, Mercy Hosp, 163 Studley Rd, Heidelberg, Vic 3084, Australia
[4] Natl Referral Hosp, Dept Obstet & Gynaecol, Honiara, Solomon Islands
[5] Off WHO Representat Solomon Isl, Dept Maternal & Child Hlth, Honiara, Solomon Islands
[6] Minist Hlth Solomon Isl, Maternal & Child Hlth Div, Honiara, Solomon Islands