Correction: Clinical and functional characteristics of individuals with alpha-1 antitrypsin deficiency: EARCO international registry.

In each box plot, the median value is indicated by the center horizontal black line, the 25th and 75th percentiles are indicated by the lower and upper box horizontal lines, and the mean value is indicated by the center horizontal white line. Clinical and functional characteristics of individuals with alpha-1 antitrypsin deficiency: EARCO international registry. [Extracted from the article]