Submitted on: 21 August 1998.
Revised on: 06 December 1998.
Accepted on: 23 January 1999.
___________________BMC Palliative Care---BMC
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Submitted on: 08 September 2013.
Revised on: 30 November 2013.
Accepted on: 17 December 2013.
___________________BMC Palliative Care---BMC
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Submitted on: 14 January 2000.
Revised on: 23 March 2000.
Accepted on: 07 April 2000.
___________________BMC Palliative Care---BMC