1. Women, Children and Adolescent Research Group, Oswaldo Cruz Foundation; Sergio Arouca National School of Public Health; Rio de Janeiro Brazil
2. Graduate School of Medicine, Kyoto University; Department of Human Health Sciences; 53 Kawara-cho, Shogo-in, Sakyo-ku Kyoto Kyoto Japan 606-8507
3. Judith Lumley Centre; Mother and Child Health Research; 215 Franklin Street Melbourne Victoria Australia 3000
4. Warwick Hospital; Department of Clinical Health Psychology; Larkin Rd Warwick UK CV34 5BW
5. King's College London; Florence Nightingale Faculty of Nursing and Midwifery, Division of Women's Health; James Clerk Maxwell Building 57 Waterloo Road London UK SE1 8WA