Receptor binding sites for substance P, but not substance K or neuromedin K, are expressed in high concentrations by arterioles, venules, and lymph nodules in surgical specimens obtained from patients with ulcerative colitis and Crohn disease. - Mantyh,C.R.; Gates,T.S.; Zimmerman,R.P.; Welton,M.L.; Passaro,E.P.; Vigna,S.R.; Magio,J.E.; Kruger,L.; Mantyh,P.W. (Proc Natl Acad Sci USA, 1988)