João Paulo Souza, Jose Guilherme Cecatti, Anibal Faundes, Sirlei Siani Morais, Jose Villar, Guillermo Carroli, Metin Gulmezoglu, Daniel Wojdyla, Nelly Zavaleta, Allan Donner, Alejandro Velazco, Vicente Bataglia, Eliette Valladares, Marius Kublickas, Arnaldo Acosta, for the World Health Organization 2005 Global Survey on Maternal and Perinatal Health Research Group
Bull World Health Organ. 2010 February; 88(2): 113–119. Published online 2009 September 11. doi: 10.2471/BLT.08.057828