1. Medfis Clinic, Avenida Viveiro 9 Bajo, 15403 Ferrol, Spain
2. Faculty of Nursing and Physiotherapy, Department of Nursing and Physiotherapy, Universidad de Salamanca, C/ Donantes de Sangre s/n, 37007 Salamanca, Spain
3. University Hospital of Salamanca, Paseo de San Vicente, 182, 37007 Salamanca, Spain
4. Faculty of Nursing and Physiotherapy, Department of Nursing and Physiotherapy, Universidad de León, Campus Universitario, AVDA Astorga, s/n, 24401 León, Spain