Erratum: Exposure to Air Pollution from Traffic and Childhood Asthma Until 12 Years of AgeEpidemiology: March 2013 - Volume 24 - Issue 2 - p 339 doi: 10.1097/EDE.0b013e318283528e Errata Free Article OutlineOutline Article MetricsMetrics Reference In the legends for Figures 2 and 3, the symbols are specified incorrectly. Empty (white) circles indicate wheeze ≥ 1 episode; gray circles indicate wheeze ≥ 3 episodes; and filled (black) circles indicate asthma.Back to Top | Article Outline Reference Gruzieva O, Bergström A, Hulchiy O, et al. Exposure to air pollution from traffic and childhood asthma until 12 years of age. Epidemiology. 2013;24:54–61 View Full Text | PubMed | CrossRef Copyright © 2013 Wolters Kluwer Health, Inc. All rights reserved.