Increased indoleamine 2,3-dioxygenase (IDO) activity and elevated serum levels of tryptophan catabolites in patients with chronic kidney disease: a possible link between chronic inflammation and uraemic symptoms

J. C Schefold, J. P Zeden, C Fotopoulou, S von Haehling, R Pschowski, D Hasper, H. D Volk, C Schuett and P. Reinke

Nephrology Dialysis Transplantation 24 ( 6 ): 1901 - 1908 , 2009