Partelli, S.; Gaujouox, S.; Maire, F.; Coletta, P.; Larroque, B.; Crippa, S.; Sauvanet, A.; Falconi, M.; Ruszniewski, P. Natural History of Small Sporadic Non-Functioning Pancreatic Neuroendocrine Tumors: An Observational Bi-Centric Study. JOP. J Pancreas (Online) 2013, 14, 553.