1. Capital and Coast District Health Board; Department of Obstetrics and Gynaecology; Wellington New Zealand
2. Conmaul Hospital of Korean Medicine; Department of Korean Obstetrics and Gynecology; Fl. 5, Lotte Castle Medici, 1656-4, Seocho-dong, Seocho-gu Seoul Korea, South
3. Sheffield Teaching Hospitals; The Jessop Wing and Royal Hallamshire Hospital; Sheffield UK S10 2JF
4. University of Southampton; Department of Obstetrics and Gynaecology; Level F, Princess Anne Hospital Coxford Road Southampton UK SO16 5YA