1 Mother and Infant Research Unit, School of Health Sciences, University of Dundee DD1 4HJ, United Kingdom. Electronic address: m.renfrew@dundee.ac.uk.
2 Nursing, Midwifery and Allied Health Professions Research Unit, University of Stirling, Stirling FK94LA, United Kingdom.
3 All4Maternity, Saturn House, Mercury Rise, Altham Industrial Park, Altham, Lancashire BB5 5BY, United Kingdom.
4 School of Health Sciences, University of East Anglia, United Kingdom.
5 THRIVE Centre, School of Community Health and Midwifery, University of Central Lancashire, Preston PR1 2HE, United Kingdom.
6 Maternal and Fetal Research Centre, University of Manchester, Manchester M13 9WL, United Kingdom.
7 Centre for Midwifery, Maternal & Perinatal Health, Bournemouth Gateway Building, St Pauls Lane, Bournemouth, BH8 8GP, United Kingdom.
8 WHO Collaborating Centre for Midwifery Development, School of Healthcare Sciences, Cardiff University CF14 4XN, United Kingdom.
9 White Ribbon Alliance UK, Art Bank, 13 High Street, Shepton Mallet, BA4 5AA, United Kingdom.
10 School of Allied Health Professions, University of Leicester, College of Life Sciences, George Davies Centre, Leicester LE1 7RH, United Kingdom.
11 Centre for Maternal & Child Health Research, School of Health Sciences, City University of London, 1 Myddelton Street, London EC1R 1UB, United Kingdom.
12 Mother and Infant Research Unit, School of Health Sciences, University of Dundee DD1 4HJ, United Kingdom.
13 Barts Health NHS Trust, Keswick Drive, Maidstone, Kent ME16 0DQ, United Kingdom.
14 Chelsea and Westminster NHS Foundation Trust and North West London, Fulham Road, London SW10 9NH, United Kingdom.
15 Department of Women and Children's Health, School of Life Course and Population Sciences, King's College London, St. Thomas' Hospital London, SE1 7EH, United Kingdom.
16 Ulster University, Jordanstown Campus, Co Antrim BT370QB, United Kingdom.
17 Faculty of Health and Social Science, Room 506 Bournemouth Gateway Building, St Paul's Lane, Bournemouth BH8 8AJ, United Kingdom.
18 Florence Nightingale Faculty of Nursing Midwifery and Palliative Care, Kings' College London, United Kingdom.
19 Centre for Care Excellence, Coventry University and University Hospitals of Coventry and Warwickshire, Centre for Healthcare Research, United Kingdom.