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Figure 2 The Acute Effects of Inhaled Iloprost Were Assessed by Pulmonary Function Tests in 13 Patients

Baseline forced expiratory volume in 1 s (FEV₁) (expressed as % predicted) was 84% (range 56% to 119%) and decreased after a single inhalation of iloprost to 79% (range –18% to +3%; p = 0.02).