1. German Sport University Cologne; Center for Preventive Doping Research - Institute of Biochemistry; Am Sportpark Müngersdorf 6 50933 Köln Germany
2. Swiss Laboratory for Doping Analysis; University Center of Legal Medicine, Geneva and Lausanne, Centre Hospitalier Universitaire Vaudois and Université Lausanne; Ch. des Croisettes 22 CH-1066 Epalinges Switzerland
3. Antidoping Centre Moscow; Elizavetinsky pereulok 10, bldg.1 RU 105005 Moscow Russia