Pan-European atmospheric lead pollution, enhanced blood lead levels, and cognitive decline from Roman-era mining and smelting by McConnell, JR, Chellman, N, Plach, A, Wensman, SM, Plunkett, G, Stohl, A, Smith, N, Vinther, BM, Dahl-Jensen, D, Steffensen, JP, Fritzsche, D, Brugger, SO, McDonald, BT, Wilson, AI