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  1. Correspondence to Mr Jonathan Crofts, Health Protection Agency Centre for Infections, 61 Colindale Avenue, London NW9 5EQ, UK; jonathan.crofts{at}
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Crofts JP, Abubakar I
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Publication history

  • Accepted August 25, 2010
  • First published June 21, 2011.
Online issue publication 
July 20, 2011

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