1. Department of Obstetrics, Gynaecology, & Reproductive Sciences University of California at San Francisco San Francisco California USA
2. Institute for Global Health Sciences University of California at San Francisco San Francisco California USA
3. Musculoskeletal Research Unit, Translational Health Sciences, Bristol Medical School University of Bristol Bristol UK
4. Institute of Behavioural Sciences Semmelweis University Faculty of Medicine Budapest Hungary
5. Program in Midwifery B.SC Semmelweis University Faculty of Health Sciences Budapest Hungary
6. School of Population & Public Health, Faculty of Medicine The University of British Columbia Vancouver British Columbia Canada
7. Division of Midwifery, Faculty of Medicine The University of British Columbia Vancouver British Columbia Canada