Isil, Riza Gurhan, et al. “Drain Amylase Monitoring for Early Diagnosis of Anastomotic Leakage in Sleeve Gastrectomy”. Annali Italiani Di Chirurgia, vol. 89, no. 6, Nov. 2018, pp. 562-8, https://annaliitalianidichirurgia.it/index.php/aic/article/view/1519.