Volume 16, Issue 7, July 2015, Pages 2981-2986
Volume 15, Issue 19, December 2014, Pages 8183-8189
Volume 13, Issue 7, July 2012, Pages 3025-3029
Volume 11, Issue 2, February 2010, Pages 567-570
Volume 10, Supplement, December 2009, Pages 29-35
Volume 9, Issue 3, March 2008, Pages 413-416