1. Applied Environmental Research Laboratories, Department of Chemistry Vancouver Island University Nanaimo Canada
2. Department of Chemistry University of Victoria Victoria Canada
3. LifeLabs Medical Laboratories Burnaby Canada
4. School of Population and Public Health University of British Columbia Vancouver Canada
5. Vancouver Coastal Health Authority Vancouver Canada
6. Department of Chemistry Simon Fraser University Burnaby Canada
7. Department of Environmental and Occupational Health Sciences University of Washington Seattle USA