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Submitted on: 21 December 2011.
Revised on: 22 January 2012.
Accepted on: 22 February 2012.
___________________Journal of Hospital Infection---W B SAUNDERS CO LTD
Submitted on: 16 August 2021.
Revised on: 13 September 2021.
Accepted on: 03 November 2021.
___________________Journal of Hospital Infection---W B SAUNDERS CO LTD
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Submitted on: 30 December 2003.
Revised on: 20 February 2004.
Accepted on: 07 April 2004.
___________________Journal of Hospital Infection---W B SAUNDERS CO LTD
Submitted on: 20 May 2023.
Revised on: 29 July 2023.
Accepted on: 26 September 2023.
___________________Journal of Hospital Infection---W B SAUNDERS CO LTD
Submitted on: 10 December 2008.
Revised on: 14 February 2009.
Accepted on: 04 March 2009.
___________________Journal of Hospital Infection---W B SAUNDERS CO LTD