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Boxplots illustrating the levels of volatile compounds present in Vintage Port wine that changed with the cellar conditions at (a) 15 months and (b) 44 months. AV—cellar A vertical position, AH—cellar A horizontal position, BH—cellar B horizontal position. *—p ≤ 0.05, **—p ≤ 0.01, ****—p ≤ 0.0001.
