1. Department of Occupational and Environmental Medicine, Epidemiology and Hygiene, Italian Workers’ Compensation Authority, Monte Porzio Catone, Rome
2. Department of Occupational and Environmental Medicine, Epidemiology and Hygiene, Italian Workers’ Compensation Authority, Monte Porzio Catone, Rome, Department of Environmental Biology, Sapienza University of Rome, Rome, Italy
3. Institut Desbrest of Epidemiology and Public Health, University of Montpellier and Institut national de la santé et de la recherche médicale, Department of Allergic and Respiratory Disease, Montpellier University Hospital,
Montpellier, France