Submitted on: 21 December 2016.
Revised on: 20 March 2017.
Accepted on: 11 April 2017.
___________________Infection Disease & Health---ELSEVIER INC
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Submitted on: 13 July 2009.
Revised on: 24 August 2009.
Accepted on: 17 October 2009.
___________________Infection Disease & Health---ELSEVIER INC
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