1. Physiotherapy Unit, Faculty of Medicine, Universidad Austral de Chile, Valdivia, Chile
2. International Doctoral School, Universidad de Murcia-Spain, Murcia, Spain
3. Administration Institute, Faculty of Economic and Administrative Sciences, Universidad Austral de Chile, Valdivia, Chile
4. Research Group Research Methods and Evaluation in Social Sciences. Mare Nostrum Campus of International Excellence, University of Murcia, Murcia, Spain
5. Faculty of Health Sciences, Universidad Cardenal Herrera-CEU, CEU Universities, Valencia, Spain