Fish intake during pregnancy and mercury level in cord and maternal blood at delivery: an environmental study in Poland - Jędrychowski, Wiesław; Perera, Frederica; Rauh, Virginia; Flak, Elżbieta; Mróz, Elżbieta; Pac, Agnieszka; Skolicki, Zbigniew; Kaim, Irena (Nofer Institute of Occupational Medicine)