[1] Univ Sydney, Daffodil Ctr, 153 Dowling St, Sydney, NSW 2011, Australia
[2] Univ Sydney, Sch Publ Hlth, Sydney, NSW, Australia
[3] Univ Melbourne, Melbourne Sch Populat & Global Hlth, Melbourne, Vic, Australia
[4] Royal Womens Hosp, Dept Oncol & Dysplasia, Melbourne, Vic, Australia
[5] Univ Melbourne, Melbourne Med Sch, Dept Obstet & Gynaecol, Melbourne, Vic, Australia
[6] Family Planning NSW, Ashfield, NSW, Australia
[7] Univ Sydney, Fac Med & Hlth, Sch Med, Discipline Obstet Gynaecol & Neonatol, Sydney, NSW, Australia
[8] Belgian Canc Ctr, Unit Canc Epidemiol, Sciensano, Brussels, Belgium
[9] Univ Ghent, Dept Human Struct & Repair, Fac Med & Hlth Sci, Ghent, Belgium