Diemen Delgado

Department of Occupational Health, Clinica Rio Blanco, Los Andes, Chile

María de los Ángeles Aguilera

Department of Public Health, University of Guadalajara, Guadalajara, México

Fabián Delgado

Workers Clinic, Manta, Ecuador

Irma Cano

Graduate School, Scientific University of the South, Lima, Peru

María de Lourdes Preciado

Department of Public Health, University of Guadalajara, Guadalajara, México

Oscar Ramírez

Graduate School, Scientific University of the South, Lima, Peru