Radiation OmisSion in PAtients With CLinically Node Negative Breast Cancer Undergoing Lumpectomy

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Royal Victoria Regional Health Centre, Barrie

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Juravinski Cancer Centre, Hamilton

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Cancer Centre of Southeastern Ontario at Kingston, Kingston

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Thunder Bay Regional Health Sciences Centre, Thunder Bay

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Sunnybrook Health Sciences -Odette Cancer Centre, Toronto

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CHUM - Centre Hospitalier de L'Université de Montréal, Montreal

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Jewish General Hospital, Montreal

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CHU de Quebec - Universite Laval, Québec

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Centre hospitalier de Lanaudière, Saint-Charles-Borromée

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Centre Hospitalier Trois Rivieres Ste-Marie, Trois-Rivières

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McGill University Health Centre (MUHC), Montreal