Volume 12, Issue 6, June 2011, Pages 1593-1597
Volume 12, Issue 2, February 2011, Pages 491-495
Volume 11, Issue 6, June 2010, Pages 1609-1613
Volume 11, Issue 1, January 2010, Pages 187-191
Volume 10, Issue 6, June 2009, Pages 1131-1136
Volume 10, Issue 4, April 2009, Pages 627-630
Volume 10, Issue 3, March 2009, Pages 513-518
Volume 6, Issue 1, January 2005, Pages 58-61
Volume 5, Issue 3, March 2004, Pages 294-300
Volume 4, Issue 3, March 2003, Pages 209-214
Volume 2, Issue 4, April 2001, Pages 263-269
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