Volume 10, Issue 6, June 2009, Pages 969-974
Volume 9, Issue 4, April 2008, Pages 631-636
Volume 9, Issue 4, April 2008, Pages 771-775
Volume 7, Issue 3, March 2006, Pages 427-430
Volume 7, Issue 1, January 2006, Pages 113-118
Volume 3, Issue 1, January 2002, Pages 69-72
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