TY - CONF AU - R Verkouteren C2 - Second Annual USADA Symposium on Anti-Doping Science, xxxx, -1 DA - 2004-12-01 LA - en PB - Second Annual USADA Symposium on Anti-Doping Science, xxxx, -1 PY - 2004 TI - Standardization of Isotope Ratio Measurements for Doping Control ER -