Corrigendum

Agergaard P, Hebert A, Bjerre J, Sørensen KM, Olesen C, Østergaard JR. Children diagnosed with congenital cardiac malformations at the national university departments of pediatric cardiology: positive predictive values of data in the Danish National Patient Registry. Clinical Epidemiology. 2011;3:61–66.

The last sentence of the second paragraph in the results section should read, “A total of 238 patients had died at the time of data retrieval”.