Nils Venhoff*, Dirk Lebrecht, Dietmar Pfeifer, Ana C Venhoff, Emmanuel Bissé, Janbernd Kirschner and Ulrich A Walker*
* Corresponding authors: Nils Venhoff nils.venhoff@uniklinik-freiburg.de - Ulrich A Walker ulrich.walker@fps-basel.ch
Arthritis Research & Therapy 2012, 14:R233 doi:10.1186/ar4076