1 School of Public Health, University of the Western Cape, Bellville, South Africa.
2 Maternal Newborn Health Group, Maternal Adolescent, Reproductive and Child Health (MARCH) Centre, London School of Hygiene and Tropical Medicine, London, UK.
3 Maternal Newborn Health Group, Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, UK.
4 World Health Organization, Geneva, Switzerland.
5 UNFPA, Dhaka, Bangladesh.
6 Maternal, Adolescent, Reproductive and Child Health (MARCH) Centre, London School of Hygiene & Tropical Medicine, London, UK.
7 Department of Medicine, Solna, Clinical Epidemiology Division, Karolinska Institutet, Stockholm, Sweden.
8 Karolinska University Hospital, Stockholm, Sweden.
9 Midwifery Science, AVAG (Academy Midwifery Amsterdam and Groningen), Amsterdam Public Health Research Institute, Amsterdam University Medical Centre, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.
10 University Medical Center Groningen, Groningen, The Netherlands.
11 Options Consultancy Services Ltd, St Magnus House, London, UK.
12 Epidemiology and Disease Control, School of Public Health, University of Ghana, Legon, Accra, Ghana.
13 Department of Maternal, Newborn, Child, Adolescent Health & Ageing, World Health Organization, Geneva, Switzerland.