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Greece has observed World Cancer Day with a series of events aimed to raise awareness and help in the prevention of the disease and support of patients. The motto of the day, observed on Saturday, was: "We change to live" was projected onto the Greek Parliament building which was lit up, Xinhua news agency reported. "It is the moral obligation of the State and all relevant authorities to do everything possible, not just to limit the instances of cancer, but to render it a simple chronic illness," Deputy Speaker of parliament Marios Georgiades said in a statement for the initiative.