1. The Krebs Institute, Department of Molecular Biology and Biotechnology, University of Sheffield, Firth Court, Western Bank, Sheffield S10 2TN, UK
2. School of Biological Sciences, AMS Building, University of Reading, Whiteknights, Reading RG6 6AJ, UK
3. Department of Rheumatology and Inflammation Research, University of Göteborg, Guldhedsgatan 10A, S-413 46 Göteborg, Sweden