InsulinomaAdenoma, Islet CellPancreatic NeoplasmsIslets of LangerhansInsulinNesidioblastosisHypoglycemiaInsulin-Secreting CellsProinsulinGlucosePancreatectomyGlucose Transporter Type 2Tumor Cells, CulturedGroup VI Phospholipases A2GlucagonomaCalcium GluconateOctreotideTolbutamideReceptors, GlucagonReceptor-Like Protein Tyrosine Phosphatases, Class 8Proprotein Convertase 2SecretagoginsMultiple Endocrine Neoplasia Type 1