Submitted on: 27 February 2007.
Revised on: 06 June 2007.
Accepted on: 06 July 2007.
___________________JOURNAL OF INFECTION AND CHEMOTHERAPY
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Submitted on: 02 May 2013.
Revised on: 04 August 2013.
Accepted on: 02 September 2013.
___________________JOURNAL OF INFECTION AND CHEMOTHERAPY