Scorcu, Giampaolo, Annarita Pilleri, Paolo Contu, Pompilio Faggiano, Roberto Floris, Alessandra Mereu, Luisella Pistis, Roberto Sessego, Luigi Valentino, and Claudia Sardu. “Preoperative Assessment of Cardiovascular Risk in Patients Undergoing Noncardiac Surgery: The Orion Study”. Monaldi Archives for Chest Disease 90, no. 1 (February 6, 2020). Accessed April 18, 2024. https://www.monaldi-archives.org/macd/article/view/1169.