1. Department of Radiation Oncology and Medical Physics, Grenoble Alpes University Hospital (CHUGA), Grenoble, France;
2. France HADRON National Research Infrastructure, IPNL, Lyon, France;
3. Laboratoire de Physique Corpusculaire IN2P3/ENSICAEN—UMR6534—Unicaen—Normandy University, Caen, France;
4. Institut Curie Centre de Protonthérapie d'Orsay, Orsay, France;
5. Centre Antoine Lacassagne, Nice, France;
6. Department of Radiation Oncology, Centre François Baclesse, Caen, France;
7. University Grenoble-Alpes, Grenoble, France