Increased expression of IL-15 in the synovium of patients with rheumatoid arthritis compared with patients with Yersinia-induced arthritis and osteoarthritis. - Thurkow,E.W.; van der Heijden,I.M.; Breedveld,F.C.; Smeets,T.J.; Daha,M.R.; Kluin,P.M.; Meinders,A.E.; Tak,P.P. (J Pathol, 1997)