Volume 15, Issue 9, September 2014, Pages 3981-3986
Volume 15, Issue 6, June 2014, Pages 2613-2618
Volume 14, Issue 12, December 2013, Pages 7069-7074
Volume 14, Issue 1, January 2013, Pages 281-285
Volume 13, Issue 3, March 2012, Pages 945-951
Volume 11, Issue 2, February 2010, Pages 271-280