1. Research, Health and Podiatry Group, Department of Health Sciences, Faculty of Nursing and Podiatry, Industrial Campus of Ferrol, Universidade da Coruña, 15403 Ferrol, Spain
2. Physiotherapy Department, Escola Superior de Saúde da Cruz Vermelha Portuguesa-Lisboa, 1300-125 Lisbon, Portugal
3. Facultad de Enfermería, Fisioterapia y Podología, Universidad Complutense de Madrid, 28040 Madrid, Spain
4. Department of Public Health, Graduate Program in Collective/Public Health, Botucatu Medical School, Universidade Estadual Paulista/UNESP, Botucatu 18610-307, SP, Brazil
5. Departamento de Sociología, Trabajo Social y Salud Pública, Universidad de Huelva, 21004 Huelva, Spain
6. Safety and Health Postgraduate Programme, Universidad Espíritu Santo, Guayaquil 092301, Ecuador