Erratum to: Clin Rheumatol

DOI 10.1007/s10067-008-0942-9

The name of one of the authors, Min Ae Lee-Kirsch, was inadvertently omitted. The full authorship of the article is as given above.

Dr. Lee-Kirsch’s affiliation is as follows:

(1) Department of Pediatric Rheumatology and Immunology, University Children’s Hospital Dresden, University Hospital “Carl Gustav Carus”, Technical University Dresden, Fetscherstr. 74, 01307 Dresden, Germany