Oberstein, Paul Eliezer, and Muhammad Wasif Saif. “Update on Prognostic and Predictive Biomarkers for Pancreatic Neuroendocrine Tumors”. JOP. Journal of the Pancreas 13, no. 4 (July 10, 2012): 368–371. Accessed May 6, 2025. https://serena.atcult.it/index.php/jop/article/view/965.