New insights into the prevalence of depressive symptoms and depression in rheumatoid arthritis - Implications from the prospective multicenter VADERA II study. oleh Matthias Englbrecht, Rieke Alten, Martin Aringer, Christoph G Baerwald, Harald Burkhardt, Nancy Eby, Jan-Paul Flacke, Gerhard Fliedner, Ulf Henkemeier, Michael W Hofmann, Stefan Kleinert, Christian Kneitz, Klaus Krüger, Christoph Pohl, Georg Schett, Marc Schmalzing, Anne-Kathrin Tausche, Hans-Peter Tony, Jörg Wendler