1. Institute of Biochemistry/Center for Preventive Doping Research German Sport University Cologne Cologne Germany
2. Dr. Margarete Fischer‐Bosch‐Institute of Clinical Pharmacology Stuttgart Germany
3. University of Tübingen Tübingen Germany
4. Departments of Clinical Pharmacology and of Biochemistry and Pharmacy University of Tübingen Tübingen Germany
5. Sports Medicine and Research Testing Laboratory South Jordan Utah USA
6. European Monitoring Center for Emerging Doping Agents (EuMoCEDA) Cologne/Bonn Germany