Mark E Ellefson

Preliminary evidence of a decline in perfluorooctanesulfonate (PFOS) and perfluorooctanoate (PFOA) concentrations in American Red Cross blood donors.

Geary W Olsen, G. Olsen, D. Ehresman, 2007, Chemosphere.

Quantitative determination of perfluorooctanoic acid in serum and plasma by liquid chromatography tandem mass spectrometry.

Bogdan Szostek, William K Reagen, Mark E Ellefson, 2005, Journal of chromatography. B, Analytical technologies in the biomedical and life sciences.

An interlaboratory study of perfluorinated alkyl compound levels in human plasma.

Eric Langlois, Jane A Hoppin, Matthew P Longnecker, 2008, Environmental research.

Decline in perfluorooctanesulfonate and other polyfluoroalkyl chemicals in American Red Cross adult blood donors, 2000-2006.

Timothy R Church, Geary W Olsen, T. Church, 2008, Environmental science & technology.

Comparative pharmacokinetics of perfluorobutyrate in rats, mice, monkeys, and humans and relevance to human exposure via drinking water.

Yu-Mei Tan, Kaberi Das, Geary W Olsen, 2008, Toxicological sciences : an official journal of the Society of Toxicology.