1 Canadian Blood Services, Ottawa, ON, Canada K1G 4J5.
2 Research and Development, Australian Red Cross Blood Service, Sydney, NSW, Australia.
3 Canadian Blood Services, 8249-114 Street, Edmonton, AB, Canada T6G 2R8; Department of Laboratory Medicine and Pathology, University of Alberta, 8249-114 Street, Edmonton, AB, Canada T6G 2R8.
4 Canadian Blood Services, Hamilton, ON, Canada; Department of Pathology and Molecular Medicine, McMaster University, HSC 4N66, 1200 Main Street West, Hamilton, ON, Canada L8N 3Z5.