Chrobák, Ladislav: Significance of serum interleukin - beta levels in hairy cell leukemia and correlation with tumor mass and sIL-2R levels. Follow up of RdW values and dyserythropoiesis and their correlation with sIL-2R values : Abstracts from "The Second Scientific Conference of the Charles University Faculty of Medicine and Teaching Hospital", 16-17 December 1997, Hradec Králové