Guidelines for initiation of anti-tumour necrosis factor therapy in rheumatoid arthritis: similarities and differences across Europe. Issue 4 (13th March 2009) - Emery, P; Van Vollenhoven, R; Ostergaard, M; Choy, E; Combe, B; Graninger, W; Krueger, K; Matucci-Cerinic, M; Navarro, F; van Riel, P; Settas, L; Steinfeld, S