%0 Journal Article %T Dose Distribution in the Heart and Cardiac Chambers Following 4-field Radiation Therapy of Breast Cancer: a Retrospective Study %A Safora Johansen %A Kristin H. Tjessem %A Kristian Foss£¿ %A Gerhard Bosse %J Breast Cancer: Basic and Clinical Research %D 2013 %I %U http://la-press.com/dose-distribution-in-the-heart-and-cardiac-chambers-following-4-field--article-a3602