1 Department of Radiation Oncology of HNE, La Chaux-de-Fonds, Switzerland; University Hospital of Vaudois (CHUV), Lausanne, Switzerland.
2 Assistance Publique-Hôpitaux de Paris, Department of Radiation Oncology, Henri Mondor Breast Center, INSERM Unit 955, EQ 07, IMRB, University of Paris-Est (UPEC), Créteil, France.