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Figure 5 Serial changes in the diameter of the ostia of the treated left superior pulmonary vein (LSPV), right superior pulmonary vein (RSPV), left inferior pulmonary vein (LIPV), and right inferior pulmonary vein (RIPV), as measured by a computed tomography scan of the thorax at baseline (B) and 3 months (3M) and 12 months (12M) of follow-up.