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WAYNE GLOWACKI / WINNIPEG FREE PRESS Ent. Dr. Sachin Katyal, senior research scientist at the Research Institute in Oncology and Hematology at CancerCare Manitoba. On the screen at left are images of brain tumour cells that had undergone irradiation to induce DNA damage. He is researching the cause of pediatric brain cancer, specifically DNA damage and how to repair it to stop tumours. Joel Schlesinger story March 31 2016