- Correspondence to Dr S Tariq Sadiq, St George's University of London, Applied Diagnostic Research and Evaluation Unit, Institute for Infection and Immunity, Cranmer Terrace, Tooting, London SW17 0RE, UK;
- Received 17 November 2016
- Revised 6 January 2017
- Accepted 14 January 2017
- Published online 3 February 2017.
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