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Immunohistochemical detection of p22phox positive cells in the adventitia of pulmonary arteries from rats exposed to normoxia (NX, n = 10), intermittent hypoxia (CIH2x2, n = 10), or chronic hypoxia (CH, n = 10). (a) Representative examples of projections obtained from confocal microscopy images (×40 zoom 4). (b) Quantitative analysis; n represents the number of animals; *P < 0.05 compared to NX.
