Impaired glucose tolerance is associated with increased serum concentrations of interleukin 6 and co-regulated acute-phase proteins but not TNF-alpha or its receptors. - Muller,S.; Martin,S.; Koenig,W.; Hanifi-Moghaddam,P.; Rathmann,W.; Haastert,B.; Giani,G.; Illig,T.; Thorand,B.; Kolb,H. (Diabetologia, 2002)