Since it`s foundation in year 1983 BIOREF`s main objective is the development, production and distribution of liquid-stable control sera for the quality control of in-vitro diagnostic tests. BIOREF controls contain a broad range of immunochemical parameters like tumor markers, hormones, cardiac markers, plasma proteins and therapeutic drugs. The controls are offered as CE-marked kits as well as OEM. The production of customized controls with regard to analyte content, analyte concentrations, filling and packaging is also possible. Many laboratories, in-vitro diagnostic companies and external quality assessment schemes rely on BIOREF`s expertise in producing control products of extraordinary high quality.