1. Department of Graphic Expression, School of Industrial Engineering, University of Extremadura, Avenida de Elvas, s/n, 06006 Badajoz, Spain
2. Department of Mechanical, Energy and Materials Engineering, School of Industrial Engineering, University of Extremadura, Avenida de Elvas, s/n, 06006 Badajoz, Spain
3. Department of Anatomy, Cell Biology and Zoology, Faculty of Science, University of Extremadura, Avenida de Elvas, s/n, 06006 Badajoz, Spain