1 Faculty of Health Sciences, University of Castilla la Mancha, Talavera de la Reina, Spain.
2 Technological Innovation Applied to Health Research Group (ITAS Group), Faculty of Health Sciences, University of de Castilla-La Mancha, Talavera de la Reina (45600), Spain.
3 Faculty of Medicine. Universidad de Valladolid, Valladolid, Spain.
4 )Technological Innovation Applied to Health Research Group (ITAS Group, Faculty of Health Sciences, University of de Castilla-La Mancha, Talavera de la Reina (45600), Spain.
5 Emergency Department. Hospital Universitario Rio Hortega. Valladolid, Spain.
6 CIBER of Respiratory Diseases (CIBERES), Institute of Health Carlos III, Madrid, Spain.
7 Faculty of Nursing. Universidad de Valladolid, Valladolid, Spain.
8 Advanced Life Support, Emergency Medical Services (SACYL), Valladolid, Spain.