1. Primary Care Services Area, Central Health Directorate, Friuli Venezia Giulia Region, Trieste, Italy;
2. Department of Medical Sciences, University of Trieste, Trieste, Italy;
3. Department of Medicine (DAME), University of Udine, Udine, Italy;
4. Clinical Unit of Occupational Medicine, Department of Medical Sciences, University of Trieste, Trieste, Italy