Relationships between PCBs and thyroid hormones and retinol in female and male polar bears.
Marte Braathen, Andrew E Derocher, Øystein Wiig, Eugen G Sørmo, Elisabeth Lie, Janneche U Skaare, and Bjørn Munro Jenssen
Environ Health Perspect. 2004 June; 112(8): 826–833. PMCID: PMC1242008