1. Department of Obstetrics and Gynecology; Faculty of Medicine; University of Colombo; Colombo Sri Lanka
2. Department of Community Medicine; Faculty of Medicine; University of Colombo; Colombo Sri Lanka
3. Early Pregnancy and Advanced Endosurgery Unit; Nepean Center for Perinatal Care; Nepean Clinical School; Nepean Hospital; University of Sydney; Sydney Australia
4. OMNI Gynecological Care; Center for Women's Ultrasound and Early Pregnancy; Sydney Australia
5. James Paget University Hospitals NHS Trusts; Great Yarmouth UK