1. SALBIS Research Group. Health Science School. Department of Nursing and Physiotherapy; University of Leon; León Spain
2. Administrative Law, Law Faculty; Universty of Salamanca; Salamanca Spain
3. The Research Group in Gene-Environment and Health Interactions, Faculty of Health Sciences, Department of Biomedical Sciences, Area of Preventive Medicine and Public Health; University of León; León Spain
4. Department of Library and Information Science, School of Humanities, Communication and Library; University Carlos III of Madrid; Madrid Spain
5. Department of Nursing and Physiotherapy, Faculty of Health Sciences; University of León; León Spain
6. Head of SALBIS Research Group. Health Science School. Department of Nursing and Physiotherapy; University of Leon; León Spain