Peter Nicholson1, Christopher Naugler2. 1. Department of Pathology and Laboratory Medicine, Dalhousie University, Halifax, Nova Scotia, Canada; Capital District Health Authority, Halifax, Nova Scotia, Canada. 2. Department of Pathology and Laboratory Medicine, University of Calgary, Calgary, Alberta, Canada; Department of Family Medicine, University of Calgary, Calgary, Alberta, Canada; Calgary Laboratory Services, Calgary, Alberta, Canada. Electronic address: christopher.naugler@cls.ab.ca.