1 Department of Radiation Oncology, Henri Mondor University Hospital, Henri Mondor Breast Cancer Center, University of Paris-Est Créteil (UPEC) and IMRB, INSERM 955 EQ07, Créteil, France.
2 Centre Universitaire Vaudois (CHUV), Hôpital neuchâtelois (HNE), Neuchâtel, Switzerland.