Gustavo Nigenda1
, Ana Langer2
, Chusri Kuchaisit3
, Mariana Romero4
, Georgina Rojas5
, Muneera Al-Osimy6
, José Villar7
, Jo Garcia8
, Yagob Al-Mazrou9
, Hassan Ba'aqeel10
, Guillermo Carroli11
, Ubaldo Farnot12
, Pisake Lumbiganon13
, José Belizán14
, Per Bergsjo15
, Leiv Bakketeig16
and Gunilla Lindmark17 
1Fundación Mexicana para la Salud, Mexico City, Mexico
2Regional Office for Latin America and the Caribbean, The Population Council. Mexico City, Mexico
3Khon Kaen University, Khon Kaen, Thailand
4Centro Rosarino de Estudios Perinatales, Rosario / Centro de Estudios de Estado y Sociedad-CONICET, Buenos Aires, Argentina
5Hospital Gineco-Obstétrico 'América Arias', Havana, Havana, Cuba
6National Guard King Khalid Hospital, Jeddah, Saudi Arabia
7Special Programme of Research, Development and Research Training in Human Reproduction, World Health Organization, Geneva, Switzerland
8National Perinatal Epidemiology Unit, Oxford University, Oxford, England
9Ministry of Health, Riyadh, Saudi Arabia
10National Guard King Khalid Hospital, Jeddah, Saudi Arabia
11Centro Rosarino de Estudios Perinatales, Rosario, Argentina
12Hospital Gineco-Obstétrico 'América Arias', Havana, Havana, Cuba
13Khon Kaen University, Khon Kaen, Thailand
14Latin American Centre for Perinatology and Human Development, Montevideo, Uruguay
15Department of Obstetrics and Gynecology, Oslo, Norway, University of Bergen, Bergen, Norway
16Department of Obstetrics and Gynecology, University of Bergen, Bergen, Norway
17Department of Obstetrics and Gynecology, University Hospital, Uppsala, Sweden