1. SALBIS Research Group, Department of Electric, Systems and Automatics Engineering, Universidad de León, León, Spain
2. SECOMUCI Research Group, Escuela de Ingenierías Industrial e Informática, Universidad de León, León, Spain
3. Faculty of Health Sciences, Universidad de León, Ponferrada, Spain
4. SALBIS Research Group, Nursing and Physical Therapy Department, Universidad de León, Ponferrada, Spain