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Submitted on: 15 October 1998.
Revised on: 03 January 1999.
Accepted on: 01 March 1999.
___________________BMJ Supportive & Palliative Care
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Submitted on: 04 February 2012.
Revised on: 05 April 2012.
Accepted on: 01 June 2012.
___________________BMJ Supportive & Palliative Care
Submitted on: 04 January 2013.
Revised on: 18 February 2013.
Accepted on: 12 March 2013.
___________________BMJ Supportive & Palliative Care
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