Complex sentence: In that same year the World Anti-Doping Agency held its first meeting to discuss the risk of gene doping, and in 2003 it proactively added gene doping to the list of banned doping practices.
Split into simpler sentences: In that same year the World Anti-Doping Agency held its first meeting to discuss the risk of gene doping. In 2003 the World Doping Agency proactively added gene doping to the list of banned doping practices.