Meta-analysis identified the TNFA -308G > A promoter polymorphism as a risk factor for disease severity in patients with rheumatoid arthritis
Erik JM Toonen, Pilar Barrera, Jaap Fransen, Arjan PM de Brouwer, Agnes M Eijsbouts, Pierre Miossec, Hubert Marotte, Hans Scheffer, Piet LCM van Riel, Barbara Franke and Marieke JH Coenen*