1. Centre for Health Equity Studies; Stockholm University/Karolinska Institute; Stockholm Sweden
2. Division of Reproductive Health; Department of Women's and Children's Health; Karolinska Institute; Stockholm Sweden
3. Judith Lumley Centre; La Trobe University; Melbourne Australia
4. Clinical Epidemiology; Department of Medicine; Karolinska Institute; Stockholm Sweden
5. Centre for Clinical Research Dalarna; Falun Sweden
6. Western Norway University of Applied Sciences; Bergen Norway