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do not necessarily apply to individual samples of foods. In studies where great accuracy is required, samples of the food consumed must be analysed.
* Measurements of food intake: In estimating energy intakes, measurements of food intake are made, and these are known to be subject to considerable uncertainty. Even in studies under very close supervision the errors in weighing individual food items are rarely less than ±5%. A certain degree of pragmatism must therefore be used when assessing procedures for calculating energy intakes, and

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