- Correspondence to Dr Mark Melzer, Department of Infection, Barts Health NHS Trust, Royal London Hospital, 3rd floor Pathology and Pharmacy Building, 80 Newark Street, London E1 2ES, UK;
- Received August 15, 2012
- Revised January 23, 2013
- Accepted February 24, 2013
- First published March 21, 2013.
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