Dartmouth Superfund Program researchers Tracy Punshon, Brian Jackson and Margaret Karagas are co-authors of a paper that examines relationships between placental concentrations of cadmium (Cd), arsenic (As), mercury (Hg) and lead (Pb) and measures of placental growth and functioning as part of the New Hampshire Birth Cohort Study. Placental Metal Concentrations in Relation to Placental Growth, Efficiency and Birth Weight