AUTHOR=Khan Atif J. , Goyal Sharad , Vicini Frank A. TITLE=Cardiac Avoidance in Breast Radiotherapy: Many Choices for a Worthwhile Objective JOURNAL=Frontiers in Oncology VOLUME=4 YEAR=2014 URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2014.00269 DOI=10.3389/fonc.2014.00269 ISSN=2234-943X