Interleukin-2- and Interferon Alfa-2a-Based Immunochemotherapy in Advanced Renal Cell Carcinoma: A Prospectively Randomized Trial of the German Cooperative Renal Carcinoma Chemoimmunotherapy Group (DGCIN). - Atzpodien,J.; Kirchner,H.; Jonas,U.; Bergmann,L.; Schott,H.; Heynemann,H.; Fornara,P.; Loening,S.A.; Roigas,J.; Muller,S.C.; Bodenstein,H.; Pomer,S.; et al. (J Clin Oncol, 2004)