1 Department of Obstetrics and Gynaecology, Monash University, Clayton, Victoria, Australia; Aberdeen Centre for Women's Health Research, School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Aberdeen, United Kingdom.
2 Department of Obstetrics and Gynaecology, Monash University, Clayton, Victoria, Australia; Department of Infectious Diseases, University of Melbourne, Parkville, Victoria, Australia.