%0 Journal Article %T Factors Related to Long-Term Survival in Patients Affected by Well-Differentiated Endocrine Tumors of the Pancreas %A Riccardo Casadei %A Claudio Ricci %A Paola Tomassetti %A Davide Campana %J ISRN Surgery %D 2012 %I Hindawi Publishing Corporation %R 10.5402/2012/389385 %U http://dx.doi.org/10.5402/2012/389385