Ventrella, Francesco, Franco Mastroianni, and Massimo Errico. “Chronic Obstructive Pulmonary Disease Pathways As a Tool to Improve Appropriateness in Internal Medicine Departments”. Italian Journal of Medicine 9, no. 2 (September 18, 2014): 96-108. Accessed October 20, 2019. https://www.italjmed.org/index.php/ijm/article/view/itjm.2014.448.