Affiliation: | Lead Consultant in Transfusion Microbiology, National Blood Service, Colindale, London NW9 5BE, UK; Lead Scientist for Transfusion Microbiology, National Blood Service, Colindale, London NW9 5BE, UK; Clinical Scientist National Blood Service, Colindale, London NW9 5BE, UK; Head of National Bacteriology Laboratory, Colindale, London NW9 5BE, UK |