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Pulmonary manifestations of 45 patients with MPA. Venn diagram of 45 patients with MPA including 23 patients with IP, 7 patients with BE, 5 patients with DAH, and 14 patients without pulmonary involvement. MPA, microscopic polyangiitis; IP, interstitial pneumonia; BE, bronchiectasis; DAH, diffuse alveolar hemorrhage.
