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. 2011 Sep 22;4:87–91. doi: 10.2147/JAA.S19107

Figure 1.

Figure 1

Symptoms and serum vitamin D levels measured over the first 6 months of treatment.

Abbreviations: PEFR, peak expiratory flow rate; FEV1, forced expiratory volume in 1 second; FVC, forced vital capacity.