Volume 15, Issue 3, March 2014, Pages 1193-1196
Volume 13, Issue 9, September 2012, Pages 4241-4244
Volume 13, Issue 8, August 2012, Pages 3781-3789
Volume 13, Issue 5, May 2012, Pages 1793-1797
Volume 13, Issue 4, April 2012, Pages 1395-1399