1. Radiation Oncology Department, Research Unit, Canary Institute for Cancer Research, Canary Islands, Spain
2. Research Unit, Medical Physics Department, Canary Institute for Cancer Research, Canary Islands, Spain
3. Radiation Oncology Department, Canary Institute for Cancer Research, Canary Islands, Spain
4. La Paterna Medical Center, Canary Islands, Spain
5. Radiation Oncology Department, University Hospital, Canary Islands, Spain
6. Chronic Pain Unit, Dr. Negrín University Hospital and Canary Institute for Cancer Research, Canary Islands, Spain
7. Research Unit, University Hospital, Canary Islands, Spain
8. Research Unit, La Paterna Medical Center, Canary Institute for Cancer Research, Canary Islands, Spain
9. Helzel Medical Systems, Kaltenkirchen, Germany