1. Nursing Department, University of Girona, Spain
2. Fundació Salut Empordà and Quality of Life Research Institute, University of Girona, Spain
3. Neurology, Hospital Universitari Dr Josep Trueta, Spain
4. Neurology, Hospital Universitari Dr Josep Trueta de Girona, Spain
5. Neurosciences Department, Hospital Universitari Germans Trias i Pujol, Spain
6. Chemistry Department, University of Girona, Spain
7. Quality of Life Research Institute, University of Girona, Spain
8. Hospital Universitario Marqués de Valdecilla, Spain