Tellini, M., Petrioli, A., Forni, S. and Morettini, A. (2015) “The revolving door syndrome in internal medicine: a study on 11,846 subjects discharged from all Internal Medicine Departments of Tuscany with diagnosis of heart failure and pneumonia”, Italian Journal of Medicine, 9(2), pp. 150–156. doi: 10.4081/itjm.2015.488.