1. North Bay Parry Sound District Health Unit, North Bay, Ontario P1B2T2, Canada
2. Public Health Ontario, Toronto, Ontario M5G1V2, Canada
3. Lawrence S. Bloomberg Faculty of Nursing, University of Toronto, Toronto, Ontario M5T1P8, Canada
4. Laboratory Medicine and Pathobiology and Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario M5S2H7, Canada