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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*

Arthritis Research & Therapy 2012, 14:R264  doi:10.1186/ar4110

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