This article refers to:
In the article by Martens HA et al published in the July/August issue of the Scandinavian Journal of Rheumatology (Scand J Rheumatol 2009;38:256-62) the name of the last author (Bijl M) was omitted. The correct author list should read as follows: Martens HA, Nolte IM, van der Steege G, Schipper M, Kallenberg CGM, te Meerman GJ, M Bijl M.