1. Center for Preventive Doping Research ‐ Institute of Biochemistry German Sport University Cologne Cologne Germany
2. European Monitoring Center for Emerging Doping Agents Cologne Germany
3. Swiss Laboratory for Doping Analyses, University Center of Legal Medicine, Genève and Lausanne Centre Hospitalier Universitaire Vaudois and University of Lausanne Epalinges Switzerland
4. United States Anti‐Doping Agency (USADA) Colorado Springs Colorado USA