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Quantification of occlusion grades and types and branch patterns of pulmonary arterial hypertension (PAH) rat (n = 5) pulmonary arteries. A: quantification of occlusion grades in relation to branch types. B: occlusion types in relation to branch types. Grade 0 lesions were not included in this bar graph. D, dichotomous; V, vertical; U, unclassified.
