Volume 13, Issue 1, January 2012, Pages 49-56
Volume 12, Issue 10, October 2011, Pages 2523-2529
Volume 12, Issue 6, June 2011, Pages 1389-1397
Volume 10, Issue 4, April 2009, Pages 605-608
Volume 9, Issue 4, April 2008, Pages 601-604
Volume 8, Issue 1, January 2007, Pages 77-82
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