Radiotherapy Department, Montpellier Cancer Institute (ICM), University of Montpellier, Montpellier, France. Radiotherapy Department, Lorraine Cancer Institute, Vandœuvre-Lès-Nancy, France. Biometrics Unit, Montpellier Cancer Institute (ICM), University of Montpellier, Montpellier, France. Radiotherapy Department, Clinique Pasteur, Toulouse, France. Clinical Research Unit, Dupuytren University Hospital, Limoges, France. Radiotherapy Department, Libourne Hospital Center, Libourne, France. Radiotherapy Department, Sainte Catherine Institute, Avignon, France. Oncology Department, Montpellier Cancer Institute (ICM), University of Montpellier, Montpellier, France. Clinical Research and Innovation Department, Montpellier Cancer Institute (ICM), University of Montpellier, Montpellier, France. Radiotherapy Department, Bretagne Sud Hospital, Lorient, France. Clinical Nutrition and Gastroenterology Department, Montpellier Cancer Institute (ICM), University of Montpellier, Montpellier, France. IRCM, University of Montpellier, Inserm, and ICM, Montpellier, France.