La Regina, M., C. Vertulli, G. Gussoni, A. Fontanella, G. Ballardini, A. Brucato, F. Orlandini, G. Murialdo, M. Campanini, and D. Manfellotto. “Not-for-Profit Observational Study to Evaluate the Quality and Safety of Care in <em>outliers</em> Hospitalized With Medical Diseases - Study Protocol of Safety Issues and SurvIval For Medical Outliers (SISIFO Study)”. Italian Journal of Medicine, vol. 15, no. 1, Mar. 2021, doi:10.4081/itjm.2021.1447.