Epidemiology and Infection

  • Epidemiology and Infection / Volume 142 / Issue 02 / February 2014, pp 303-313
  • Copyright © Cambridge University Press 2013 The online version of this article is published within an Open Access environment subject to the conditions of the Creative Commons Attribution-NonCommercial-ShareAlike licence <http://creativecommons.org/licenses/by-nc-sa/3.0/>. The written permission of Cambridge University Press must be obtained for commercial re-use.
  • DOI: http://dx.doi.org/10.1017/S0950268813001088 (About DOI), Published online: 15 May 2013