1. Faculty of Dentistry and Health Sciences; Charles Sturt University; Wagga Wagga New South Wales Australia
2. RPA Women and Babies; Royal Prince Alfred Hospital; University of Sydney; Camperdown New South Wales Australia
3. Department of Obstetrics and Gynaecology; Aarhus University Hospital; Aarhus Denmark
4. Institute of Clinical Medicine; Aarhus University; Aarhus Denmark