1. Consumer and Clinical Radiation Protection Bureau, Health Canada, Ottawa, Ontario, Canada;
2. Radiation Protection Bureau, Health Canada, Ottawa, Ontario, Canada;
3. Environmental Health Sciences and Research Bureau, Health Canada, Ottawa, Ontario, Canada;
4. Canadian Nuclear Laboratories, Chalk River, Ontario, Canada
5. Canadian Nuclear Safety Commission, Ottawa, Ontario, Canada;
6. Regulatory Operations and Regions Branch, Health Canada, Ottawa, Ontario, Canada;