Jejunoileal BypassHyperlipidemiasHyperglycemiaTriglyceridesBlood GlucoseInsulinLipidsDiabetes Mellitus, ExperimentalGlucoseCholesterolHypertriglyceridemiaDiabetes Mellitus, Type 2Lipid MetabolismLiverCholesterol, HDLInsulin ResistanceHypoglycemic AgentsLipaseLipoproteinsFastingLipoproteins, VLDLFatty Acids, NonesterifiedGlucose Tolerance TestPostprandial PeriodDiabetes MellitusStreptozocin