1. The World Anti-Doping Agency: Laboratory statistics. 2005, http://www.wada-ama.org/Documents/Science_Medicine/Anti-Doping_Laboratories/WADA_LaboStatistics_2005.pdf, [accessed on 20.09.2012]
2. The World Anti-Doping Agency: Laboratory statistics. 2006, http://www.wada-ama.org/Documents/Science_Medicine/Anti-Doping_Laboratories/WADA_LaboStatistics_2006.pdf, [accessed on 20.09.2012]
3. The World Anti-Doping Agency: Laboratory statistics. 2007, http://www.wada-ama.org/Documents/Science_Medicine/Anti-Doping_Laboratories/WADA_LaboStatistics_2007.pdf, [accessed on 20.09.2012]
4. The World Anti-Doping Agency: Laboratory statistics. 2008, http://www.wada-ama.org/Documents/Science_Medicine/Anti-Doping_Laboratories/WADA_LaboStatistics_2008.pdf, [accessed on 20.09.2012]
5. The World Anti-Doping Agency: Laboratory statistics. 2009, http://www.wada-ama.org/Documents/Science_Medicine/Anti-Doping_Laboratories/Lab_Statistics/WADA_2009_LaboratoryStatisticsReport_Final.pdf, [accessed on 20.09.2012]