1. Programa de Pós-Graduação em Epidemiologia, Universidade Federal de Pelotas, Pelotas, Brazil
2. Nuffield Department of Obstetrics & Gynaecology and Oxford Maternal & Perinatal Health Institute, Green Templeton College, University of Oxford, Oxford, England
3. Programa de Pós-Graduação em Epidemiologia, Universidade Federal de Pelotas, Pelotas, Brazil3Programa de Pós-Graduação em Saúde e Comportamento, Universidade Católica de Pelotas, Pelotas, Brazil
4. Department of Pediatrics, Boonshoft School of Medicine, Wright State University, Dayton, Ohio
5. Dipartimento di Scienze della Sanita Pubblica e Pediatriche, Struttura Complessa di Neonatologia Universitaria, Università degli Studi di Torino, Torino, Italy
6. Nuffield Department of Obstetrics & Gynaecology and Oxford Maternal & Perinatal Health Institute, Green Templeton College, University of Oxford, Oxford, England6Centre for Statistics in Medicine, Botnar Research Centre, University of Oxford, Oxford, Engla
7. Faculty of Health Sciences, Aga Khan University, Nairobi, Kenya
8. Department of Family and Community Health, Ministry of Health, Muscat, Sultanate of Oman
9. Centre for Statistics in Medicine, Botnar Research Centre, University of Oxford, Oxford, England
10. Department of Engineering Science, University of Oxford, Oxford, England
11. Global Alliance to Prevent Prematurity and Stillbirth, Seattle Children’s Hospital, Seattle, Washington
12. Nagpur INTERGROWTH-21st Research Centre, Ketkar Hospital, Nagpur, India
13. Center for Perinatal Studies, Swedish Medical Center, Seattle, Washington
14. School of Public Health, Peking University, Beijing, China
15. Center of Excellence in Women and Child Health, The Aga Khan University, Karachi, Pakistan 15Center for Global Child Health, Hospital for Sick Children, Toronto, Ontario, Canada