PhlebotomyBlood GlucoseGlucoseBlood Glucose Self-MonitoringGlucose Tolerance TestInsulinHypoglycemiaGlucose IntoleranceHypoglycemic AgentsDiabetes Mellitus, Type 2HyperglycemiaGlucose OxidaseDiabetes MellitusHemoglobin A, GlycosylatedDiabetes Mellitus, ExperimentalGlucose Transporter Type 1FastingDiabetes Mellitus, Type 1Glucose Transporter Type 4GlucagonDiagnostic EquipmentPostprandial PeriodSensitivity and SpecificityGluconeogenesisDeoxyglucoseMonosaccharide Transport ProteinsIslets of LangerhansGlucose Transporter Type 2GlycosuriaGlucose 1-DehydrogenaseDiagnostic Errors