1. Department of Radiation Oncology, Tenon Hospital, Hôpitaux Universitaires Est Parisien, University Pierre and Marie Curie Paris VI, Paris, France;
2. Department of Radiation Oncology at Memorial Sloan-Kettering Cancer Center, New York, NY, USA;
3. Department of Radiology at Memorial Sloan-Kettering Cancer Center, New York, NY, USA;
4. Department of Biostatistics at Memorial Sloan-Kettering Cancer Center, New York, NY, USA;
5. Department of Medical Oncology at Memorial Sloan-Kettering Cancer Center, New York, NY, USA;
6. Department of Surgery at Memorial Sloan-Kettering Cancer Center, New York, NY, USA;
7. Department of Radiation Oncology, University of Colorado School of Medicine, Aurora, CO, USA