118: Impact of Internal Mammary Node Radiation on Survival of Patients with Breast Cancer: Extended Follow Up of a Population Based Analysis. (September 2016) - Olson, Robert; Maas, Benjamin; Gondara, Lovedeep; Woods, Ryan; Speers, Caroline; Truong, Pauline; Lo, Andrea; Olivotto, Ivo; Tyldesley, Scott; Nichol, Alan; Weir, Lorna