1. Department of Obstetrics, Gynecology and Reproductive Sciences The University of California, San Francisco San Francisco California USA
2. Department of Obstetrics and Gynecology David Geffen School of Medicine at University of California, Los Angeles Los Angeles California USA
3. Department of Obstetrics and Gynecology, Ramathibodi Hospital Mahidol University Bangkok Thailand
4. Department of Oncology and Dysplasia The Royal Women's Hospital Melbourne Victoria Australia
5. Stanford Cancer Institute, Stanford University School of Medicine Stanford California USA