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Surveillance in general has been defined as the systematic collection and analysis of data pursued with well-defined objectives. More specifically, a Nutritional Surveillance System (NSS) scrutinizes the occurrence in a population of dietary-mediated nutritional conditions, with the objective of describing the current situation, detecting trends, forecasting changes, highlighting priorities and targeting corrective and preventive measures
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Ferro-Luzzi et al. (1991) studied this question.
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