Retraction

The following article from Clinical & Experimental Immunology, “The European internet-based patient and research database for primary immunodeficiencies” by B. Gathmann, N. Binder, S. Ehl and G. Kindle for the ESID Registry Working Party, published online on 30th January 2012 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the authors, the journal Editor in Chief, Mark Peakman, and Blackwell Publishing Ltd. The retraction has been agreed due to the authors not having received full permission from some of the collaborators who were involved in the study.