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11 - Walther MM, Johnson B, Culley D, Shah R, Weber J, Venzon D, Yang JC, Linehan WM, Rosenberg SA. Serum interleukin-6 levels in metastatic renal cell carcinoma before treatment with interleukin-2 correlates with paraneoplastic syndromes but not patient survival. JUrol 1998 Mar;159(3):718-22