1. Department of Obstetrics and Gynaecology; Monash University; Clayton Australia
2. Department of Obstetrics and Gynaecology; Tameside & Glossop Acute Services NHS Trust; Ashton-Under-Lyne UK
3. Discipline of Obstetrics and Gynaecology, School of Medicine, Robinson Research Institute; The University of Adelaide; Adelaide Australia
4. Department of Obstetrics and Gynaecology; Stockport NHS Foundation Trust; Stockport UK
5. St Mary's Hospital; Manchester UK