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Overall, percentage wall thickness (%WT) is greater in the upper lobe compared with the lower lobe (A) and greater in the small muscular pulmonary arteries compared with the medium and large muscular pulmonary arteries (B). The %WT did not vary significantly among the pulmonary arterial pressure group (C). *
, †
, ‡
. ns, not significant; PH, pulmonary hypertension.
