1. Department of Statistics and Quantitative Methods, University of Milano-Bicocca, Milan, Italy
2. Italian National Institute of Statistics, Rome, Italy
3. Center for Health Data Science, Human Technopole, Milan, Italy
4. National Centre for Healthcare Research and Pharmacoepidemiology, University of Milano-Bicocca, Milan, Italy
5. MOX, Department of Mathematics, Politecnico di Milano, Milan, Italy
6. Center of Epidemiology and Biostatistics, Polytechnic University of Marche, Ancona, Italy
7. Iconsulting S.p.a., Rome, Italy
8. Agency for Health Protection of Val Padana, Lombardy Region, Cremona, Italy
9. Directorate General for Health, Lombardy Region, Milan, Italy
10. Agenzia Regionale Emergenza Urgenza, Milan, Italy
11. Italian National Institute of Health (ISS), Rome, Italy