Radiation Therapy Before Surgery Compared With Chemotherapy Plus Radiation After Surgery in Treating Patients With Rectal Cancer That Can Be Surgically Removed

Tom Baker Cancer Centre - Calgary, Calgary

CancerCare Manitoba, Winnipeg

Saint John Regional Hospital, Saint John

Cancer Centre of Southeastern Ontario at Kingston General Hospital, Kingston

Ottawa Hospital Regional Cancer Centre - General Campus, Ottawa

St. Catharines General Hospital at Niagara Health System, St. Catharines

Toronto Sunnybrook Regional Cancer Centre at Sunnybrook Health Sciences Centre, Toronto

Hopital Charles Lemoyne, Greenfield Park

Ninewells Hospital and Medical School, Dundee