Age and comorbidity association with survival outcomes in metastatic colorectal cancer: CALGB 80405 analysis

Nadine J. McCleary, Sui Zhang, Chao Ma, Fang Shu Ou, Tiffany M. Bainter, Alan P. Venook, Donna Niedzwiecki, Heinz Josef Lenz, Federico Innocenti, Bert H. O'Neil, Blase N. Polite, Howard S. Hochster, James N. Atkins, Richard M. Goldberg, Kimmie Ng, Robert J. Mayer, Charles D. Blanke, Eileen M. O'Reilly, Charles S. Fuchs, Jeffrey A. Meyerhardt