Cytokine expression in intestinal mucosal biopsies. In situ hybridisation of the mRNA for interleukin-1 beta, interleukin-6 and tumour necrosis factor-alpha in inflammatory bowel disease - Woywodt,A.; Neustock,P.; Kruse,A.; Schwarting,K.; Ludwig,D.; Stange,E.F. (Eur Cytokine Netw, 1994)