Following the publication of the original article [1], it was brought to our attention that citation number 20 had been truncated. At current the reference reads as:‘20. Freire SM, Sundvall E, Karlsson D, Lambrix P. Performance of XML Databases for Epidemiological Queries in Archetype-Based EHRs. 2012:51–57.’However, it should instead read as:‘20. Freire SM, Sundvall E, Karlsson D, Lambrix P. Performance of XML Databases for Epidemiological Queries in Archetype-Based EHRs. Scandinavian Conference on Health Informatics 2012:51–57. http://www.ep.liu.se/ecp/070/009/ecp1270009.pdf’