2 Universidade de Santiago de Compostela, Campus Terra, Spain. Electronic address: [email protected].
3 Division of Nursing, Cantabrian Health Service 061, Cantabria, Spain. Electronic address: [email protected].
4 Education and Research Departament, Emergency Medical Service Fundación Pública Urgencias Sanitarias 061 Conselleria de Sanidade, Santiago de Compostela, Spain. Electronic address: [email protected].