1 Division of Maternal-Fetal Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.
2 Department of Obstetrics and Gynecology, University of Washington, Seattle, WA, USA.
3 Department of Epidemiology & Biostatistics, Arnold School of Public Health, University of South Carolina, Columbia, SC, USA.
4 Consultant in Obstetrics, Institute for Women's Health, University College London, UK.
5 Consultant Obstetrician, St Thomas' Hospital, London, UK.
6 Consultant in Obstetrics and Fetal Medicine, John Radcliffe Hospital, University of Oxford, Oxford, UK.
7 Division of Maternal-Fetal Medicine, Wayne State University, Detroit, MI, USA.
8 Department of Obstetrics and Gynecology, Columbia University Medical Center, New York, NY, USA.
9 Consultant in Obstetrics and Subspecialist in Fetal Medicine, St George's University of London, London, UK.
10 Consultant in Obstetrics and Fetal Medicine, Norfolk and Norwich University Hospital, Norwich, UK.
11 Consultant Obstetrician, Subspecialist in Maternal and Fetal Medicine, Barts Health NHS Trust, London, UK.
12 Director of Scientific and Medical Affairs, Sanofi Pasteur, Swiftwater, PA, USA.
13 Professor of Fetal Medicine, Newcastle University, Newcastle upon Tyne, UK.
14 Deputy Director of Immunization Technical Support Unit, Public Health Fund of India, New Delhi, India.
15 Global Healthcare Consulting, New Delhi, India; Erasmus University Medical Center, Rotterdam, The Netherlands.
16 Division of Maternal-Fetal Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA. Electronic address: contact@brightoncollaboration.org.