Dartmouth Superfund Research Program researchers Margaret Karagas and Brian Jackson are co-authors of the paper Validity of Retrospective Occupational Exposure Estimates of Lead and Manganese in a Case-Control Study. The study used toenail samples as bioindicators of exposure and “assessed whether work tasks and expert assessments of occupational metal exposure obtained from personal interviews were associated with lead and manganese concentrations”. The paper is published in the journal Occupational & Environmental Medicine.