Xenofon Baraliakos, Joachim Listing, Jan Brandt, Martin Rudwaleit, Joachim Sieper and Juergen Braun*
* Corresponding author: Juergen Braun j.braun@rheumazentrum-ruhrgebiet.de
Arthritis Research & Therapy 2005, 7:R439-R444 doi:10.1186/ar1693