1Risk Sciences International, 55 Metcalfe Street, Suite 700, K1P 6L5, Ottawa, Canada
2R. Samuel McLaughlin Centre for Population Health Risk Assessment, Faculty of Medicine, University of Ottawa, 850 Peter Morand Crescent, Room 119, Ottawa, K1G 3Z7, Canada
3School of Epidemiology, Public Health and Preventive Medicine, University of Ottawa, 451 Smyth Road, Ottawa, K1H 8M5, Canada
4School of Mathematics and Statistics, 1125 Colonel By Drive, 4302 Herzberg Laboratories, 5215HP, Carleton University, Ottawa, K1S 5B6, Canada
5International Manganese Institute, 17 rue Duphot, 75001 Paris, France