Volume 13, Issue 9, September 2012, Pages 4597-4606
Volume 13, Issue 7, July 2012, Pages 3293-3298
Volume 12, Issue 8, August 2011, Pages 1989-1993
Volume 12, Issue 1, January 2011, Pages 55-59
Volume 9, Issue 3, March 2008, Pages 437-440
Volume 4, Issue 3, March 2003, Pages 233-237
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