1. The University of Adelaide; Discipline of Obstetrics and Gynaecology; Women's and Children's Hospital, Level 1 QVB 72 King William Street North Adelaide South Australia Australia 5006
2. Christchurch Polytechnic Institute of Technology (CPIT); Faculty of Applied Sciences and Allied Health, School of Midwifery; P.O.Box 540 Christchurch New Zealand 8140