Submitted on: 29 September 2014.
Revised on: 18 December 2014.
Accepted on: 30 December 2014.
___________________EPIDEMIOLOGY AND INFECTION---CAMBRIDGE UNIV PRESS
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Submitted on: 13 October 2010.
Revised on: 12 November 2010.
Accepted on: 07 December 2010.
___________________EPIDEMIOLOGY AND INFECTION---CAMBRIDGE UNIV PRESS
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Submitted on: 21 April 2015.
Revised on: 25 June 2015.
Accepted on: 30 July 2015.
___________________EPIDEMIOLOGY AND INFECTION---CAMBRIDGE UNIV PRESS
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Submitted on: 21 February 1998.
Revised on: 07 April 1998.
Accepted on: 14 May 1998.
___________________EPIDEMIOLOGY AND INFECTION---CAMBRIDGE UNIV PRESS
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