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Submitted on: 21 May 2005.
Revised on: 26 June 2005.
Accepted on: 06 July 2005.
Malaysian Journal of Medical Sciences
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Submitted on: 12 February 2013.
Revised on: 04 March 2013.
Accepted on: 28 March 2013.
Malaysian Journal of Medical Sciences
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Submitted on: 22 April 2006.
Revised on: 12 May 2006.
Accepted on: 19 May 2006.
Malaysian Journal of Medical Sciences
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http://reply.papertrans.cn/3/212/21169/21169-30.png