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Fig. 1 | Nutrition Journal

Fig. 1

From: Association between micronutrient deficiency and acute respiratory infections in healthy adults: a systematic review of observational studies

Fig. 1

Flowchart of the process of study selection. *Only 4 studies clearly met the inclusion criteria [17,18,19,20]; the other 4 studies did not clearly meet the inclusion criteria due to missing information [21,22,23,24] but were judged to be relevant and highly likely to meet the inclusion criteria should missing information become available

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