Outcomes of Adjuvant Radiation Therapy and Lymph Node Dissection in Elderly Pancreatic Cancer Patients Treated With Surgery and Chemotherapy. - Freilich, J.; Mellon, E.A.; Springett, G.; Meredith, K.L.; Hodul, P.J.; Malafa, M.P.; Fulp, W.J.; Zhao, X.; Hoffe, S.E.; Shridhar, R. (International Journal of Radiation Oncology, Biology, Physics, 2013)