- The type 1 diabetes susceptibility gene SUMO4 at IDDM5 is not associated with susceptibility to rheumatoid arthritis or juvenile idiopathic arthritis. Gibbons, L.J., Thomson, W., Zeggini, E., Worthington, J., Barton, A., Eyre, S., Donn, R., Hinks, A. Rheumatology (Oxford, England) (2005)