Birth Weight

• Fengrun Maternal and Child Health Institute — Fengrun, Hebei, China
• Yuanshi Maternal and Child Health Institute — Huaiyang, Hebei, China
• Laoting Maternal and Child Health Institute — Laoting, Hebei, China
• Mancheng Maternal and Child Health Institute — Mancheng, Hebei, China

• Centre Muraz — Bobo-Dioulasso, Burkina Faso

• Masaryk university affiliated hospital, Clinic of Obstetrics and Gynecology — Brno, Moravia, Czechia

Not specified

• Neonatal Unit, Wishaw Hospital, 50 Netherton St — Wishaw, Lanrkshire, United Kingdom
• The Queen Mother's Hospital, Yorkhill — Glasgow, United Kingdom
• Maternity Hospital, Glasgow Royal Infirmary — Glasgow, United Kingdom
• Maternity Unit, Southern General Hospital, 1345 Govan Road — Glasgow, United Kingdom

• Danish Epidemiology Science Centre — Vennelyst Boulevard 6, Aarhus, Denmark

• Addis Continental Institute of Public Health (ACIPH) — Addis Ababa, Ethiopia

• Helsinki university central hospital — Helsinki, Finland

• University of Oxford — Oxford, United Kingdom

• Aikmel, Sakra, and Sikur Subdistrict — Mataram, West Nusa Tenggara, Indonesia