After the publication of this work  we found out that Table 1 was not filled in correctly in the original article. The total number of strains analyzed in the ptxP1 or the ptxP3 lineage was not shown between the brackets, leading to incompleteness of the data. The revised Table 1 is shown below.
Table 1. Presence of regions of difference in Dutch clinical isolates from 1993 to 2004
We regret any inconvenience that the incompleteness of Table 1 in the original article might have caused.
King AJ, van Gorkom T, Pennings JL, van der Heide HG, He Q, Diavatopoulos D, et al.: Comparative genomic profiling of Dutch clinical Bordetella pertussis isolates using DNA microarrays: identification of genes absent from epidemic strains.