Tellini, M., A. Petrioli, S. Forni, and A. Morettini. “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, vol. 9, no. 2, May 2015, pp. 150-6, doi:10.4081/itjm.2015.488.