title: Corrigendum.
abstract: Guedes RS, Piovesan C, Ardenghi TM, Emmanuelli B, Braga MM, Ekstrand KR, Mendes FM. 2014. Validation of visual caries activity assessment: a 2-year cohort study. J Dent Res. 93(7 suppl):101S-107S. (Original DOI: 10.1177/0022034514531017)The authors regret that they did not adequately provide credit to the original source of the scoring system used as a part of the manuscript, highlighted in Table 1. The following reference from Nyvad et al. should have been included:Nyvad B, Machiulskiene V, Baelum V. 1999. Reliability of a new caries diagnostic system differentiating between active and inactive caries lesions. Caries Res. 33(4):252-260.