1. Canadian Blood Services; Ottawa Ontario Canada
2. Department of Laboratory Medicine; the Keenan Research Centre, Li Ka Shing Knowledge Institute, St Michael's Hospital; Toronto Ontario Canada
3. Laboratory Medicine and Pathobiology; University of Toronto; Toronto Ontario Canada
4. Department of Biology & Biochemistry; University of Bath; Bath United Kingdom
5. Department of Biochemistry; Oxford Glycobiology Institute, University of Oxford; Oxford United Kingdom