![File:Normal values for Peak Expiratory Flow PEF - EU scale - symbolic designators.png - Wikimedia Commons File:Normal values for Peak Expiratory Flow PEF - EU scale - symbolic designators.png - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/5/57/Normal_values_for_Peak_Expiratory_Flow_PEF_-_EU_scale_-_symbolic_designators.png)
File:Normal values for Peak Expiratory Flow PEF - EU scale - symbolic designators.png - Wikimedia Commons
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Table 1 from Peak expiratory flow in normal medical students in Maiduguri, Borno state, Nigeria | Semantic Scholar
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PDF] Normative data of peak expiratory flow rate in healthy school children of Ghaziabad city—a pilot study - | Semantic Scholar
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Normal values of peak expiratory flow rate in children from the town of Babol, Iran. | Semantic Scholar
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