Crea, Nicola, Francesco Di Fabio, Giacomo Pata, and Riccardo Nascimbeni. “APACHE II, POSSUM, and ASA Scores and the Risk of Perioperative Complications in Patients With Colorectal Disease”. Annali Italiani di Chirurgia 80, no. 3 (May 1, 2009): 177–181. Accessed May 8, 2024. https://annaliitalianidichirurgia.it/index.php/aic/article/view/1528.