Blood Glucose Monitoring Systems: Discounter Versus Brand

Inclusion Criteria: * Male or female, with clinical indication for blood glucose measurement * Signed informed consent form * Minimum age of 18 years * Subjects are legally competent and capable to understand character, meaning and consequences of the study. Exclusion Criteria: * Pregnancy or lactation period * Severe acute disease (at the study physician's discretion) * Severe chronic disease with inherent risk of aggravation by the procedure (at the study physician's discretion) * Current constitution that compromises the subject's capability to participate in the study (at the study physician's discretion) * A current constitution that does not allow participating in the study (e.g. hematocrit out of BGM specifications, medication known to influence blood glucose measurements; see Appendix A of ISO 15197) * Being unable to give informed consent * \< 18 years * Legally incompetent