1. Program of Environmental and Workers’ Health; Institute of Collective Health; Federal University of Bahia; University Campus of Canela; Salvador Bahia Brazil
2. Fundacentro; Ministry of Labor; São Paulo Brazil
3. Reference Center of Workers’ Health; State Health Department of São Paulo; São Paulo Brazil
4. Epidemiology Unit; Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico; Milan Italy