National Institute for the Insurance of Work Related Injuries; Department of Medicine, Epidemiology, Occupational & Environmental Hygiene, Rome, Italy, Local Health Unit N.2 "Marca Trevigiana", Public Health Department, Treviso, Italy, National Institute for the Insurance of Work Related Injuries; Department of Medicine, Epidemiology, Occupational & Environmental Hygiene, Rome, Italy, Azienda Zero, Epidemiological Service, Padua, Veneto Region, Italy, National Institute for the Insurance of Work Related Injuries; Department of Medicine, Epidemiology, Occupational & Environmental Hygiene, Rome, Italy, Padua University, Department of Cardiac, Thoracic, Vascular Sciences & Public Health, Padua, Italy, National Institute for the Insurance of Work Related Injuries; Department of Medicine, Epidemiology, Occupational & Environmental Hygiene, Rome, Italy and Padua University, Department of Cardiac, Thoracic, Vascular Sciences & Public Health, Padua, Italy