TY - RPRT TI - The colloidal thyroxine (T4) ring as a novel biomarker of perchlorate exposure in the African clawed frog Xenopus laevis AU - F. Hu AU - Bibek Sharma AU - S. Mukhi AU - R. Patino AU - J.A. Carr PY - 2006 DO - 10.1093/toxsci/kfl053 UR - https://pubs.usgs.gov/publication/70028456 ID - 70028456 ER -