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The data used to analyze the levels and trends reported here have been accumulated over several iterations and decades, including for earlier UNSCN reports on the world nutrition situation, and for an extensive update and analysis in 2004 supported by the Micronutrient Initiative and UNICEF (see Mason, Rivers & Helwig, 2005). These compilations drew most of their data from WHO’s databases, and from Demographic and Health Surveys (DHS), UNICEF (State of the World’s Children, ChildInfo) and similar sources. For the present update, starting in 2008, new outcome data were sought and introduced primarily from WHO’s current databases, adding to the existing files; other sources are given under the respective deficiencies.
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