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Figure 1: Relationship between the 6-min walk distance and forced expiratory volume in 1 s percent. A signifi cant positive correlation was observed ( = 0.524, P = 0.006)

Figure 1: Relationship between the 6-min walk distance and forced expiratory volume in 1 s percent. A signifi cant positive correlation was observed ( = 0.524, P = 0.006)