1. Department of Pathology and Laboratory MedicineDalhousie University Halifax Nova Scotia Canada
2. Department of Pathology and Laboratory MedicineNova Scotia Healthy Authority Halifax Nova Scotia Canada
3. Department of Community Health and EpidemiologyDalhousie University Halifax Nova Scotia Canada
4. Research Methods UnitNova Scotia Health Authority Halifax Nova Scotia Canada
5. Department of MedicineDalhousie University Halifax Nova Scotia Canada