Volume 14, Issue 4, April 2013, Pages 2159-2165
Volume 14, Issue 3, March 2013, Pages 2147-2150
Volume 13, Issue 9, September 2012, Pages 4311-4314
Volume 13, Issue 5, May 2012, Pages 2405-2408
Volume 12, Issue 9, September 2011, Pages 2255-2261
Volume 12, Issue 6, June 2011, Pages 1499-1506
Volume 11, Issue 2, February 2010, Pages 577-579