ZHANGJIAKOU, China (AP) — Russian figure skater Kamila Valieva listed two legal substances used to improve heart function on an anti-doping control form she filled out before her drug case at the Olympics erupted. That is according to documents submitted in her case. The World Anti-Doping Agency filed a brief in the Valieva case stating that the existence of legal drugs L-carnitine and Hypoxen undercuts the argument that the banned substance trimetazidine might have entered the skater’s system accidentally. Valieva tested positive for a banned medication in December but the result only came to light after she had helped the Russians win team gold last week. She's being allowed to skate in Beijing because at 15 years old she is a protected minor.