Schwab, C.; Le Moigne, A.; Fernandez, C.; Durieux, P.; Sabatier, B.; Korb-Savoldelli, V. External Validation of the 80+ Score and Comparison With Three Clinical Scores Identifying Patients at Least 75 Years Old at Risk of Unplanned Readmission Within 30 Days After Discharge. Swiss Med Wkly 2018, 148, w14624.