1. Medical Oncology Service, University Assistance Complex of Salamanca, Spanish Association against Cancer, Salamanca, Spain;
2. Department of Nursing and Physiotherapy, University of Salamanca, Salamanca, Spain;
3. Biomedical Research Institute of Salamanca, Cancer Area, Study Group on the Prediction of Solid Tumors, Salamanca, Spain;
4. Nursing Unit of the Medical Oncology Service, University Hospital of Salamanca, Salamanca, Spain;
5. Medical Oncology Service, University Hospital of Salamanca, Salamanca, Spain;
6. Department of Medicine, University of Salamanca, Salamanca, Spain