1. Primary Care Services Area Central Health Directorate, Friuli Venezia Giulia Region Trieste Italy
2. Department of Medicine, Surgery and Health Sciences University of Trieste Trieste Italy
3. Department of Mathematics and Geosciences University of Trieste Trieste Italy
4. Epidemiological Service Trust for the Centralised Management of Shared Services (EGAS) Udine Italy
5. Department of Medical and Biological Sciences University of Udine Udine Italy
6. Department of Medicine Centre for Pharmacoepidemiology Karolinska Institutet Stockholm Sweden