1. Instrumental
Analytical Chemistry, University Duisburg-Essen, Universitätsstr. 5, 45141 Essen, Germany
2. Institute
of Biochemistry,
Center for Preventive Doping Research, German Sport University Cologne, Am Sportpark
Muengersdorf 6, 50933 Cologne, Germany
3. Institute of Energy and Environmental Technology e.V., (IUTA), Bliersheimer Strasse 60, 47229 Duisburg, Germany