1. Center for Preventive Doping Research and Institute of Biochemistry; German Sport University Cologne; Am Sportpark Müngersdorf 6 50933 Cologne Germany
2. Center for Molecular Medicine Cologne; University of Cologne; Robert-Koch-Str. 21 Germany
3. CER Groupe - Département Santé; Rue du Point du Jour, 8 Marloie Belgium