Submitted on: 11 October 2002.
Revised on: 27 January 2003.
Accepted on: 15 February 2003.
___________________Bahrain Medical Bulletin---BAHRAIN MEDICAL BULLETIN
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Submitted on: 08 February 2017.
Revised on: 22 April 2017.
Accepted on: 16 June 2017.
___________________Bahrain Medical Bulletin---BAHRAIN MEDICAL BULLETIN
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