Submitted on: 15 March 2014.
Revised on: 05 June 2014.
Accepted on: 14 July 2014.
___________________Journal of Patient Safety---LIPPINCOTT WILLIAMS & WILKINS
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Submitted on: 23 February 2004.
Revised on: 09 June 2004.
Accepted on: 27 July 2004.
___________________Journal of Patient Safety---LIPPINCOTT WILLIAMS & WILKINS