1. Evaluative Epidemiology Unit, Department of Epidemiology and Data Science Fondazione IRCCS Istituto Nazionale dei Tumori Milan Italy
2. National Centre for Healthcare Research and Pharmacoepidemiology University of Milano‐Bicocca Milan Italy
3. Unit of Biostatistics, Epidemiology and Public Health, Department of Statistics and Quantitative Methods University of Milano‐Bicocca Milan Italy