1. Department of Research and Postgraduate, Universidad de Aconcagua, Los Andes 2102660, Chile
2. School of Medicine, Neurology and Psychiatry, Universidad de Texas Rio Grande Valley, Edinburg, TX 78539, USA
3. Departament of Occupational Health, Instituto de Salud Pública de Chile, Santiago 7780050, Chile
4. School of Medicine, Universidad Andrés Bello-Viña del Mar, Valparaíso 2520000, Chile
5. Department of Sociology, Social Work and Public Health, Faculty of Labour Sciences, University of Huelva, 21007 Huelva, Spain
6. Safety and Health Postgraduate Programme, Universidad Espíritu Santo, Guayaquil 092301, Ecuador