1. Group of Cellular Oncology, Biodonostia Health Research Institute, San Sebastian, Spain
2. CIBER of Frailty and Healthy Aging (CIBERfes), Spain
3. Group of Multiple Sclerosis, Biodonostia Health Research Institute, San Sebastian, Spain
4. Group of Primary Health, Biodonostia Health Research Institute, San Sebastian, Spain, Health Services Research on Chronic Patients Network (REDISSEC), Spain
5. Spanish Network of Multiple Sclerosis, Spain
6. IKERBASQUE, Basque Foundation, Bilbao, Spain