Volume 11, Issue 6, June 2010, Pages 1587-1594
Volume 10, Issue 6, June 2009, Pages 1101-1106
Volume 10, Issue 6, June 2009, Pages 1147-1150
Volume 10, Issue 4, April 2009, Pages 559-564
Volume 9, Issue 1, January 2008, Pages 31-35
Volume 4, Issue 1, January 2003, Pages 23-30
Volume 2, Issue 3, March 2001, Pages 207-213