1 Geneva University Paediatric Hospital, Geneva, Switzerland.
2 Médecins Sans Frontières, Toronto, Canada.
3 California Preterm Birth Initiative, Department of Obstetrics, Gynaecology, & Reproductive Sciences, University of California San Francisco, San Francisco, San Francisco, California, United States of America.
4 Queen Elizabeth Hospital, Gateshead, United Kingdom.
5 Médecins Sans Frontières, Dakar, Senegal.
6 Save the Children, London, United Kingdom.
7 Division of Emergency Medicine, Department of Paediatrics, Children's Hospital of Philadelphia and University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, United States of America.
8 Independent Researcher, Stockholm, Sweden.
9 Stanford University School of Medicine, Stanford, California, United States of America.