1. From the University of Milano-Bicocca, Italy (G.M.)
2. Department of Statistics and Quantitative Methods, Laboratory of Healthcare Research and Pharmacoepidemiology, Unit of Biostatistics, Epidemiology, and Public Health (F.R., G.C.), University of Milano-Bicocca, Italy
3. Department of Medicine and Surgery Clinica Medica (G.G.), University of Milano-Bicocca, Italy
4. IRCCS Mutimedica, Sesto San Giovanni, Milan, Italy (G.G.).