Volume 16, Issue 6, June 2015, Pages 2537-2542
Volume 15, Issue 21, December 2014, Pages 9543-9547
Volume 13, Issue 5, May 2012, Pages 2291-2297
Volume 13, Issue 3, March 2012, Pages 963-968
Volume 10, Issue 2, February 2009, Pages 219-222